The New Version of Our SG Optimizer Plugin Is a Game Changer for Your WordPress Performance

Early versions of our SG Optimizer plugin had one single purpose: to connect WordPress with the reverse proxy caching system set up on our servers. Over the years, we have added multiple features like PHP and HTTPS management options that allow even more control over SiteGround’s server environment right from the WordPress backend. With the new release, not only have we greatly enhanced the existing functionalities, but we’ve also included some of the most popular application-based performance optimizations. Now, our plugin is an all-inclusive performance solution for WordPress sites hosted on our platform. Our SG Optimizer has always been an invaluable tool in boosting site performance and now we’ve pushed its capabilities even further. Internal speed tests of the new version show an additional 20-30% performance improvement even for well-optimized sites. And when you use the plugin on a site that runs on an old PHP version and/or has poorly-optimized content, the benefit can easily go up to 500%!

Smarter Dynamic Cache Purging

The NGINX-powered full page caching has been a core functionality of the plugin from the start. Now, we have significantly enhanced that feature by improving the cache purge functionality. Before this release, any time there was a change on your site, even just a new comment on a blog post, the plugin purged the cache for the whole site. This meant that many visitors would see non-cached content, causing slow page loading times. With the new version, we purge the whole site cache only when there are important changes like when you update your WordPress version or install a theme or a plugin. On all other occasions, we have smart rules to determine which part of the cache to flush. For example, when someone publishes a comment on your blog post, only that post’s URL will be cleared from the cache and regenerated on the next visit. The less your cache is purged, the less times your site will be reloaded.

Brand New Front-End & Image Optimizations

A whole new set of front-end and image optimization features are now part of our plugin. Most of them are well-known and widely used application level optimizations that make WordPress sites faster. What’s unique to us is we’ve designed our plugin specifically for the SiteGround environment in order to minimize the resource footprint the optimizations cause.

  • Automatic image optimization option for new uploads and manual bulk optimizer function for old ones.
  • Lazy loading of images that reduces the initial loading time of your pages and is especially useful for long ones with lots of images like the blogroll page.
  • GZIP Compression to compress your content before it’s served to the browser and save bandwidth.
  • CSS, JavaScript, and HTML minification that improves the loading speed of your site by reducing the size of your resources.
  • Remove query strings from static resources to improve the way your content is cached by your visitors and potentially your CDN, if you’re using one.
  • Option to disable emoji support to avoid unnecessary overhead by the emoji conversion script.
  • Browser Caching Control that automatically adds the necessary rules for your visitors’ browsers to cache your static content longer than the default settings.

Improved HTTPS Traffic Redirect

In the old plugin version, we used to redirect the traffic to HTTPS dynamically, which is not optimal because it adds to the loading time of your site. Although the footprint was minimal, it was still present. In the new plugin version, we have split the process of forcing HTTPS on your site into two steps. First, we update your database, re-configuring your site to work with your SSL certificate and place a redirect to HTTPS. For the majority of sites, that’s enough. However, depending on the code of your theme or plugins, some resources may not be in the database. In these situations, when your site gets loaded in the browser, you will see the red warning “insecure content” on the page. Our second feature is designed in case there’s content not covered by the first one. The “Fix Insecure Content” toggle will scan for insecure content and dynamically rewrite those for you.

Other Functionality Improvements

Beside the main functionality enhancements listed above, the new version of our plugin has brought a number of smaller but handy improvements to several other areas:

Better Memchached support

We’ve enhanced the Memcached support in the new plugin version. Previously, additional tweaking was required when  changing the PHP versions of your site. Not anymore! The Memcached works smoothly with all PHP versions supported by SiteGround. Our improved implementation also allows you to see statistics about which objects are served via Memcached for each page. These stats can be visualized with the help of the Debug bar plugin.

Easier PHP version change

When checking your site for compatibility with the recommended PHP version, we now run more optimized checks that save time and server resources. We also made switching between different PHP versions easier.

All functions available through WP-CLI

WP-CLI provides easy command line site management, but until now, we weren’t using WP-CLI to its full potential. Now, we’ve expanded the commands and you can change every option in the Optimizer backend through your command line.

Sleeker Interface for Single Site and Multisite

The new version of our plugin introduces a simpler, cleaner look and feel.  Its interface is now fully redesigned and written in React, which allows us to better handle processes and perform tasks that can take a longer period of time without stalling or exhausting too many resources for a short period of time.

The Multisite controls allow administrators to perform bulk actions across their network and are now easier to find and use. They are all neatly listed in a single section of the plugin instead of in different places in the general multisite WordPress admin panel.

Other Performance Plugins Compatibility

As SiteGround clients, you know our platform is compatible with all sorts of third-party plugins. That’s intentional. Unfortunately, we see that many performance plugins cannot achieve the most optimal performance results because they are designed to generally work well with multiple hosting platforms, rather than generate the best possible results for a specific platform of which they might not know the ins-and-outs. That is why we decided to step up and offer an all-inclusive solution specifically shaped to the characteristics of our environment, creating the best possible performance for sites hosted with us.

That being said, as always, it is up to you which plugins to use given that you are the expert in your business objectives. However, should you choose to use a specific plugin that has an overlapping functionality with the SG Optimizer plugin 5.0, we recommend you disable that option in the SiteGround Optimizer interface. Instead of making your site faster, two plugins trying to achieve the same thing may actually make it slower.

NOTE: Whenever you upgrade to or install the new plugin version, we will check if your WordPress is already using another performance plugin that may have an overlapping functionality with the SG Optimizer. If this is the case, the overlapping options in our plugin will be automatically switched off. You will need to switch them on manually if you would like to use them through the SiteGround Optimizer.

For detailed instruction on how to use the new optimization features check out our SG Optimizer tutorial.

WordPress Initiatives Manager

Enthusiastic about all Open Source applications you can think of, but mostly about WordPress. Add a pinch of love for web design, new technologies, search engine optimisation and you are pretty much there!


  1. Reply December 3, 2018 / 09:14 David PascoeSiteGround Team

    Sounds great.

    Something in the optimiser is breaking ninja-popups though. I get

    Notice: Undefined variable: POST_CATS in /home/XXXX/public_html/wp-content/plugins/arscode-ninja-popups/arscode-ninja-popups.php on line 1432

    When I turn SG optimiser off and go back to Rocket plugin, all fine.

    Should I raise a ticket?

    • Reply December 3, 2018 / 11:00 Hristo PandjarovSiteGround Team

      Please, update to 5.0.2 and everything will be fine!

  2. Reply December 3, 2018 / 09:14 ChrisSiteGround Team

    Just updated on my site today and everything working fine.
    The new SG Optimizer's UI looks more beautiful compared to previous version. I love it!
    By the way, I'm interesting that SiteGround will implement Brotli Compression along the GZIP Compression which better compression for static files like CSS, JS, Image, or HTML.

    • Reply December 3, 2018 / 11:06 Hristo PandjarovSiteGround Team

      Thanks for the suggestion, will look into it 🙂

  3. Reply December 3, 2018 / 09:52 ArbySiteGround Team

    You really should provide more detailed technical information about your image optimization. I currently use "Shortpixel" and would like to compare the two options.

  4. Reply December 3, 2018 / 10:22 BenSiteGround Team

    I don't believe this new version is compatible with WP Popup Maker for WordPress. My popup now appears in the footer of my site (as explained in Solution 2 of this article I didn't have this problem with previous versions.

    • Reply December 3, 2018 / 11:00 Hristo PandjarovSiteGround Team

      Please, update to 5.0.2 it should work fine with it.

      • December 6, 2018 / 10:29 BenSiteGround Team

        I'm on 5.0.6 now and I'm having the same issue.

      • December 6, 2018 / 10:33 Hristo PandjarovSiteGround Team

        Please, disable all minifications from our plugin. I will look into this in details.

      • December 14, 2018 / 17:24 BenSiteGround Team

        Disabling the minifications worked - thanks!

  5. Reply December 3, 2018 / 12:49 Bret WilliamsSiteGround Team

    As of updating, my staging subdomain was thrown up live, and after first support contact, fixed, but now the staging sub is no longer accessible with wp-admin. Support not getting back to me. I see you've even thrown up 5.0.3 so I'm guessing you've got your hands full with this misstep. On my live site, not sure if people are messing with it, but offline products keep going online and I have to keep turning them off. What is going on? Suport ticket going unanswered for an hour...

    • Reply December 4, 2018 / 03:24 Hristo PandjarovSiteGround Team

      The problem is caused by the object caching and the fact that you've cloned your sites including the salts during their creation. Sites sharing salts is a very bad idea when it comes to security and object cache usage. I've asked our support team to update your ticket and regenerate the salts on one of the sites in order to avoid such issues from happening.

  6. Reply December 3, 2018 / 18:07 AlexSiteGround Team

    Ok, now its time to switch from W3 Total Cache. 🙂 Getting better results with few clicks than with tons of settings before.

  7. Reply December 3, 2018 / 19:14 JasonSiteGround Team

    What is the best PHP version to be running at this point?

    • Reply December 4, 2018 / 03:26 Hristo PandjarovSiteGround Team

      I would say 7.2 if your site can handle it. 7.1 is great safe version right now until all plugins get to a state where they support 7.2.

  8. Reply December 3, 2018 / 19:15 Tim AldridgeSiteGround Team

    Hows does the image optimization of this plugin compare to others such as EWWW Image optimizer?

    • Reply December 4, 2018 / 03:26 Hristo PandjarovSiteGround Team

      Ours uses server-side binaries to perform the optimization which should work faster and more resource-efficient than a regular plugin.

      • December 5, 2018 / 11:31 ArbySiteGround Team

        That's great but what are the parameters? Does it do JPEG/PNG/PNG8 comparisons and choose the best? What level of compression on JPG? What does it do with the original images?

        Some details here would be helpful.

      • December 6, 2018 / 04:55 Hristo PandjarovSiteGround Team

        We use optipng, jpegoptim and gifsicle for image optimization!

  9. Reply December 3, 2018 / 22:28 DVJySiteGround Team

    Can I uninstall the Image optimization plugin & use SG optimizer now ?

    • Reply December 4, 2018 / 03:27 Hristo PandjarovSiteGround Team

      Yes, you can.

  10. Reply December 3, 2018 / 23:54 Ronald SeguraSiteGround Team

    After I updated the plugin I can't enable Memcached from my site's backend.

    • Reply December 4, 2018 / 03:27 Hristo PandjarovSiteGround Team

      Please, check if it's enabled in the cPanel. If so, kindly post a ticket in your Help Desk and we will check your particular case!

  11. Reply December 4, 2018 / 02:59 DomSiteGround Team

    First, thank you for providing us with some major improvements, as I tested version 5.0.3 on my site. Many new features look really great and beneficial.

    A site I manage : has 1050 posts and 1142 media items. So, when I removed plugin "EWWG Image Optimizer" to run your new function of "Images Optimization" and "Existing Images Optimization" I was logically told to "PLEASE BE PATIENT, THIS PROCESS MAY TAKE SOME TIME".

    Well, there seems to be a bug, as it has ran for almost 12 hours and still "not completed", showing a kind of never-ending loop.

    Can you please let me know what I should do - or if this will be fixed with 5.0.4 ?

    • Reply December 6, 2018 / 05:14 Hristo PandjarovSiteGround Team

      That should be fixed with the last update. We found a bug with certain browsers that fail to render our status updates. Actually, your files should be optimized, just the notice didn't refresh properly. All fixed now though 🙂

  12. Reply December 4, 2018 / 03:53 preethSiteGround Team

    is it better than swift paid

    • Reply December 6, 2018 / 05:02 Hristo PandjarovSiteGround Team

      Should be. Still working on some real and comprehensive tests which I will publish later on this year.

  13. Reply December 4, 2018 / 04:47 PeteSiteGround Team

    Does the minify & combine of CSS and JS bypass plugin scripts? I've just enabled it on a test site and it has not merged anything, but has compressed a single file slightly further than it was.

    • Reply December 6, 2018 / 05:03 Hristo PandjarovSiteGround Team

      We do not combine since we strongly believe that everyone should use HTTPS and HTTP2. Minification does work with plugin and theme scripts. We store the minified version in the same folder to prevent relative links from breaking.

  14. Reply December 4, 2018 / 05:51 David PasacoeSiteGround Team

    I see that 5.0.3 is already released and install on my site and it looks like the error is gone and ninja-popups is working with full SG optimising options turned on.

    Looks like I no longer need WP rocket as you guys do it all. Nice and thanks!

    • Reply December 6, 2018 / 05:03 Hristo PandjarovSiteGround Team

      Thanks for the kind words, we're working hard to fix every incompatibility with other plugins.

  15. Reply December 4, 2018 / 09:32 EdgarSiteGround Team

    Important notice of the SG Optimizer plugin: We have detected that there are duplicate functionalities with other plugins installed on your site: Imagify, WP Rocket and we have disabled the following functions of our plugin: GZIP Compression, Browser Caching, HTML Minification, JavaScript Minification, CSS Minification, Images Optimization If you wish to activate them, please do so from the SG Optimizer configuration page.

    Hi, I love that SG Optimizer has been updated with many improvements, but I have a doubt due to the message that throws me with problems with other plugins. What should I do? SG Optimizer will be a good substitute for them?

    • Reply December 6, 2018 / 05:13 Hristo PandjarovSiteGround Team

      Generally, for performance sake, it's not a good idea to duplicate functionality - if you're minifying with one plugin, don't minify with another one. Our goal is to have a single plugin to handle all apsects of your site optimization - caching, scripts, images, environment configuration so you don't have to use 3-4 other plugins to achieve all that.

  16. Reply December 4, 2018 / 10:31 MartinSiteGround Team

    Will it be better to just use SG optimizer now or continue with WP Rocket as well?

    • Reply December 6, 2018 / 05:05 Hristo PandjarovSiteGround Team

      Check out how your site behaves with SG Optimizer only. It should provide you the best performance on our infrastructure.

  17. Reply December 4, 2018 / 10:50 MarcelSiteGround Team

    Thanks for this great update.

    I wonder if I should still be using WP Rocket along with SG Optimizer?!

    • Reply December 6, 2018 / 05:04 Hristo PandjarovSiteGround Team

      I would say try how your site performs with SG Optimizer only. It should be the best option for SiteGround customers now!

  18. Reply December 4, 2018 / 10:56 CubertSiteGround Team

    Hi Hristo,
    Any idea why all of the plug in settings are disabled after I've enabled all of them and restarted my WP dashboard?
    I've tried deactivating/reactivating the plugin to no avail. Curious! I'd really like to apply each of these features!

    • Reply December 6, 2018 / 05:10 Hristo PandjarovSiteGround Team

      That's super strange. Do you have memcached enabled on that site?

  19. Reply December 4, 2018 / 11:04 YWMCSiteGround Team

    After updating plugin, killed several Ecwid scripts and cause other issues. Please confirm when it is safe to update. I had to disabled on all my 100 sites.

  20. Reply December 4, 2018 / 12:22 UmairSiteGround Team

    Seems great.

    Should I now disable HTML, JavaSc, and CSS minifications in Cloudflare and turn them on in the plugin?

    • Reply December 6, 2018 / 05:01 Hristo PandjarovSiteGround Team

      Well, just don't enable them in the plugin if you're alrady doing it fine on CloudFlare. It's the same the otherway around, minification is minification, won't change much if you do it in the plugin or at the CDN 🙂

  21. Reply December 4, 2018 / 20:41 Brian RossiterSiteGround Team

    Thank you so much, SiteGround team! 🙂

  22. Reply December 5, 2018 / 03:06 Mike BSiteGround Team


    Looks like a great interface. If you use the Siteground frontend optimisation options, what should be done if the siteground linked Cloudflare Auto-Minify options are currently selected?

    Also, do you know if the plugin plays nice with Divi? Have had issues with other optimisation plugins messing with the page builder etc.


    • Reply December 6, 2018 / 05:09 Hristo PandjarovSiteGround Team

      Generally, avoid duplicating functionality. If you have minifiication enabled in CloudFlare, don't enable it in our plugin. As for Divi - it should work just fine with it since we monitor all the necessary hooks.

  23. Reply December 5, 2018 / 03:35 UmairSiteGround Team

    I was thinking of buying WP Rocket. After the recent Supercacher update, do I still need that, or is SG plugin enough?

    Can both plugins work at the same time?

    Also, need to know if I should disable HTML, CSS, and JavaSc. minifications in Cloudflare after enabling them in the Sitegrond plugin?

    • Reply December 6, 2018 / 05:00 Hristo PandjarovSiteGround Team

      I would say - check out the results you're getting with our plugin. They should be great 🙂 As for your other question - it won't hurt or break anything, just a general rule is not to duplicate functionality. If you're minifying in CloudFlare, simply disable that in our plugin.

  24. Reply December 5, 2018 / 04:01 Chris MyersSiteGround Team

    Thanks this is looks like a great plugin and it is really good to see you guys continuing to develop to keep you and us ahead of the game.

    I currently use the jetpack functionality for lazy loading and image CDN along with the old SG plugin and cloudflare CDN.

    Can you give us some guidance as to what we should be using for the optimal setup now. As I can't see that using jetpack and this and all of the Cloudflare will be beneficial and will probably slow it down or cause errors as there is duplication and additional connections.

    Thanks again, you do a great job!

    • Reply December 6, 2018 / 04:59 Hristo PandjarovSiteGround Team

      That's a great idea for a paper on the best setup on SiteGround. At this point, I would say - try all options and see how they work on your site. As to the CDN, just don't double functionality - if you minify with CloudFlare - do not enable minification on our plugin. Everything else should be fine 🙂

  25. Reply December 5, 2018 / 04:17 John GeertsSiteGround Team

    I have the same issue as Ronald Segura regarding the Memcached. I cannot enable it in WP.

    It is enable in the cPanel

    • Reply December 6, 2018 / 04:58 Hristo PandjarovSiteGround Team

      Fixed with an update!

  26. Reply December 5, 2018 / 07:43 Mark KooijmanSiteGround Team

    The new SG Optimizer Plugin works wonders and is extremely effective for the load time of my webshop Load time 2.00 s. @Pingdom

    Page size 9.0 KB
    Load time 2.00 s
    Requests 38

  27. Reply December 5, 2018 / 10:38 Dan WhitmoreSiteGround Team

    Could this plugin completely replace WP Rocket Pro - or does that still offer some functionality and optimisations that this plugin currently doesn't?

    • Reply December 6, 2018 / 04:57 Hristo PandjarovSiteGround Team

      Yes, I think so. The only thing we don't do is the cache preloading which doesn't make much sense since we use NGINX as reverse proxy and store your content in the server memory for faster access.

  28. Reply December 5, 2018 / 11:26 ArbySiteGround Team

    Jeez SG, test more thoroughly next time! 5 updates in the last couple days, and this morning I saw my site was broken (had to do another SG Optimizer update and then clear cache). Lost me some ad revenue there!

    • Reply December 6, 2018 / 04:56 Hristo PandjarovSiteGround Team

      I am sorry for the inconvenience caused. Optimization plugins touch pretty much every part of WP and conflicts with other plugins happen. I am afraid that those are really hard to predict before releasing the plugin to public. One of the reasons why we use our own auto update system and not the included WP one - we make backups and restore them automatically after update if we notice such error / white screen.

  29. Reply December 5, 2018 / 12:34 Jake OrtmanSiteGround Team

    Very cool. It appears this will replace at least a couple of my plugins (Smush, Autoptimize and Really Simple SSL) along with some of what I had WP Total Hacks installed for (possibly -- I inherited the site, so I'm still learning my way around the various plugins that were used).

  30. Reply December 5, 2018 / 15:59 JasonSiteGround Team

    Very nice work Hristo, just a quick question - I'm also a WP Rocket user & was just wondering if the compatibility remains between SG Optimizer & WP Rocket with this new release? Have you worked with them at all on any aspects of this update?

    • Reply December 6, 2018 / 04:51 Hristo PandjarovSiteGround Team

      So far, SG Optimizer was only caching solution plus several quick tools like PHP Version switch and HTTPS enforcer and the compatibility between the two was WP Rocket disabling their cache if they figure out ours is running. With the new update, I would recommend that you try and measure how your site behaves with our plugin and new functionality or WP Rocket only. I firmly believe that we've developed the best possible optimization solution for SiteGround customers and that you will no longer need other optimization plugins for your site.

      • December 10, 2018 / 18:28 JasonSiteGround Team

        Thanks Hristo, I will run some tests. So just to throw another spanner in the works, how about

      • December 11, 2018 / 06:56 Hristo PandjarovSiteGround Team


  31. Reply December 6, 2018 / 02:45 DarrenSiteGround Team

    This is a fantastic update, i really hope it means I can drop other optimisation plug-ins.

    So I have updated to 5.05 and switched everything on... an impressive GTmetrix score of A 95%, but... Yslow is only C (72%) grade.

    It flags up - Make fewer HTTP requests (F grade):
    This page has 27 external Javascript scripts. Try combining them into one.
    This page has 23 external stylesheets. Try combining them into one.

    I was hoping SG Optimiser would fix this with Minify switched on? is that not the case?

    • Reply December 6, 2018 / 04:48 Hristo PandjarovSiteGround Team

      We haven't added scripts combination functionality on purpose for several reasons. First, the cance for it to break something is big, especially for JS files. Unlike CSS, some javascript relies on the order of loading to work properly. In addition to that, with the introduction of HTTP2 on all our servers, it doesn't make much sense to concatenate scripts. In your case, I would ignore that suggestion, most test services are still running on HTTP1. Measure the end result - how faster your site actually is for you and your visitors 🙂

      • December 6, 2018 / 06:48 DarrenSiteGround Team

        Thanks for the explanation, that makes sense. The bottom line is my site loads in just over 1 sec so I guess that’s all that matters.

      • December 12, 2018 / 12:52 FritsSiteGround Team

        Then I'm wondering why in the description for both js and css files it says: "COMBINE and minify".

        You're right combining these can cause errors. However, I've mostly had great results with the plug-in "Fast Velocity Minify" (which also can combine scripts and caches them).

        My suggestion would be to separate the 2 (as the above mentioned plug-in does, btw): so: 1 option to minify, another option to combine. Then it's easy to see whether it works or not, and - if needed - turn off the option.


      • December 13, 2018 / 01:00 Hristo PandjarovSiteGround Team

        That will be fixed in the next update, it's an old string from when we tested combination too. We do not combine files because it's way too dangerous (especially JS files) for the majority of users and with HTTPS and HTTP2 it doesn't make sense to combine resources unless you have extremely high number of those.

  32. Reply December 6, 2018 / 10:43 DorianSiteGround Team

    Hi Hristo,

    Nice update and congrats for such a great job.
    One question: did anyone test speed compared to Autoptimize?
    Also any comments on image optimization feature vs ShortPixel or Cloudflare's Polish?


    • Reply December 7, 2018 / 11:25 Hristo PandjarovSiteGround Team

      I plan on performing tests agains pretty much every caching solution out there but they are not ready yet!

  33. Reply December 6, 2018 / 10:50 NateSiteGround Team

    Sadly 5.0.5 took my site down. Sound like from support there are some known issues. Look forward to having it work again! Real time update: 5.0.6 did it too.

    • Reply December 8, 2018 / 00:57 Hristo PandjarovSiteGround Team

      Sorry to hear you've had issues. I am sure our support team will assist you with them though.

  34. Reply December 6, 2018 / 14:06 AndySiteGround Team

    Not yet ready for release. Affects all sort of directory perms, had many nightmares with it on .5 and .6 recent releases.

    • Reply December 8, 2018 / 00:58 Hristo PandjarovSiteGround Team

      The plugin does not interfere with your files or folders permissions in any way. That must be something else interfering with it and causing the issue. I am sure our support team will assist you with this.

  35. Reply December 6, 2018 / 16:57 Frederick D.SiteGround Team

    This looks really great! From reading the comments above I saw that Divi should be supported by monitoring the necessary hooks. It looks like I can discontinue the use of WP Smush and be relieved their annoying messages.

    I updated one of my sites yesterday to SG Optimizer 5.0.5 and somehow that site got redirected in total to another of my sites. The client was not pleased. In working with Support (which was excellent as always!) we did a restore from the daily backup and all was well again. I was able to reproduce that error by installing SG Optimizer 5.0.5 again and doing a rollback myself.

    Is it safe to assume that SG Optimizer 5.0.6, available today, has fixed that behavior?

    This new plug-in will be great since it is tuned to the SiteGround infrastructure. I'm looking forward to using it on all my sites very soon.

    • Reply December 7, 2018 / 11:38 Hristo PandjarovSiteGround Team

      The latest version has the issue you've experienced fixed and it's safe to update and use it! Make sure you check out your site after each change you make in order to avoid issues with other plugins.

      • December 14, 2018 / 18:54 Frederick D.SiteGround Team

        All is working very well so far. I can tell there is a speed up in load times already.

        Sites with a lot of images are taking forever for the 'existing images optimization'. One site has been churning away since 0900 and it's now 1700. Thanks for adding the 'Pause' button.

        Would it be possible to please add a thermometer or gauge of some kind? That would indicate that progress actually is being made. The spinning circle is nice, but doesn't tell me if there is a hang up or something.

        I do have wp_cron enabled in the wp_config file too... Thanks!

      • December 17, 2018 / 02:49 Hristo PandjarovSiteGround Team

        Can you email me your domain at hristo.p [at] so I can look into it?

  36. Reply December 6, 2018 / 21:40 Dan AustinSiteGround Team

    Staging area - Running SG Optimizer Version 5.0.6
    Attempting to optimize my images...
    WE ARE OPTIMIZING YOUR IMAGES, PLEASE BE PATIENT, THIS PROCESS MAY TAKE SOME TIME. has been running for 15 minutes for a media library that has about 50 images. Should it take this long? I have MEMCACHED turned on.
    Can I push this to production if the optimization has not yet completed?

    • Reply December 7, 2018 / 11:26 Hristo PandjarovSiteGround Team

      Please, clear your browser cache and refresh or update to the latest plugin version. Depending on the number of images, that process may take a long time. Post a ticket in your Help Desk if issues occur.

  37. Reply December 7, 2018 / 18:53 Craig RosenfeldSiteGround Team

    I had problem where your plug in was shrinking the size of embedded YouTube videos (it made the embedded videos look like a long, thin banner, instead of 800x450 which is what I had the embed code set as) ... .. Is this fix addressed in the latest version?
    Also, I use Autoptimize along with W3 Total Cache, in addition to your SG Optimizer, but since I had the shrinking YouTube video issue, I had to 'roll back' my site to a previous days version and keep an old version of your plug in.... I am now hesitant to update to your latest version due to the shrinking size of embedded YouTube videos ... Are all issues fixed? ... Can I remove Autoptimize and W3 Total Cache and just use your SG Optimizer? Or should I wait for a more stable version? (I asked this in Support tickets and I have been given contradicting answers)

    • Reply December 8, 2018 / 00:25 Hristo PandjarovSiteGround Team

      That looks like an issue with the CSS minification. Try disabling that functionality and it should work fine. We've fixed everything reported so far. In addition, I would suggest that you do not duplicate functionality and leave only our plugin if you are using all of its options. If you prefer using different one for something like image optimization for example - make sure that functionality is turned off in our end.

  38. Reply December 8, 2018 / 04:36 Ian BuckSiteGround Team

    Just so you are aware, the new version of the plugin conflicts with Caldera forms. If both are activated it produces a 504 error.

    • Reply December 10, 2018 / 01:27 Hristo PandjarovSiteGround Team

      Thanks for reporting this, we will look into it.

  39. Reply December 9, 2018 / 00:23 NagaSiteGround Team

    I am hosting images outside the WP installation in subdomain like "". Looks lazy loading doesn't work on this situation and try to create static files files from subdirectory like "". This makes 403 error for all images and blocked on the site.

    Hope you can check and ensure it works on all scenarios.

    • Reply December 10, 2018 / 01:08 Hristo PandjarovSiteGround Team

      Thanks for reporting that. Please keep the Lazy Load off for now, we will fix that in the upcoming updates 🙂

  40. Reply December 9, 2018 / 09:08 GiacSiteGround Team

    SG Optimizer seems a great solution but unluckily I was not able to activate all its functions, between them the one we'd like to use is Memcache. Once we activate it on the plugin (after doing it on cPanel) we see the cpu load going skyrocketing...we disabled some plugins but the issue remains... once disabled again in cPane clearly the site gets back to normal ops... any hint on how to proceed?

    • Reply December 10, 2018 / 01:27 Hristo PandjarovSiteGround Team

      Some plugins don't play well with object caching, how's site performance with Memcached disabled?

      • December 10, 2018 / 08:36 GiacSiteGround Team

        They are ok, I was trying to activate it to as that functionality was particularly helpful... guess we'll have to troubleshoot deactivating plugin and crashing the site several times... was hoping for a magic trick 🙂

  41. Reply December 10, 2018 / 08:28 DonnieSiteGround Team

    I have the latest update to SG Opt. Memcached randomly turns its self off. It's happened several times over the last week or 2. I'll turn it on, then at some point a day or 2 or 3 later I'll notice it's off again. It's been turned on in c-panel the whole time.

    • Reply December 11, 2018 / 06:58 Hristo PandjarovSiteGround Team

      Thanks for reporting this, I will look into it!

      • December 11, 2018 / 10:52 DonnieSiteGround Team

        You're welcome.

      • June 18, 2019 / 06:05 Andy SaltSiteGround Team

        I'm having the exact same issue. Did you find a solution?

      • June 19, 2019 / 02:09 Hristo PandjarovSiteGround Team

        Issue is fixed with the latest update. If you continue experiencing it, please contact our support team.

  42. Reply December 10, 2018 / 08:39 Larry LevensonSiteGround Team

    Hey SG -- lots of my fellow multisite developers use SG hosting and there is a big conversation (and a lot of confusion) on the WPMUDEV discussion of SG Optimizer vs Hummingbird.

    Perhaps you could chime in there and clarify some things as well as add an additional blog post here. Thanks for at least checking it out!


    • Reply December 13, 2018 / 01:11 Hristo PandjarovSiteGround Team

      I would love to, but it's a private forum.

  43. Reply December 10, 2018 / 13:56 AndySiteGround Team

    It looks like SG Optimizer is a fantastic tool.

    I have just some problem when using the CSS minification (The primary colour settings are no more recognised) Is there anything that can be done about it?

    • Reply December 13, 2018 / 01:07 Hristo PandjarovSiteGround Team

      Switch that off and keep the other optimizations. Can you mail me your domain at hristo.p [at] so I can look into it and see what we can improve?

  44. Reply December 11, 2018 / 00:06 airpressSiteGround Team

    Where in cPanel can I find and enable Memcashed?

    • Reply December 11, 2018 / 06:55 Hristo PandjarovSiteGround Team

      It's in the SuperCacher tool!

  45. Reply December 11, 2018 / 03:38 OrjanSiteGround Team

    Is there any plans to add support for excluding URLs in the Lazy Load Images feature in a future version of this plugin?
    Currently we have to disable the feature for the entire site as we have two URLs containing some javascript photo galleries that break when lazy laod is enabled.

    • Reply December 11, 2018 / 06:55 Hristo PandjarovSiteGround Team

      That's great feedback, we will discuss it on our next dev meeting and add it to the roadmap. Definitelly sounds like something worth doing. Excluding HTML elements from it, class, IDs or file names. We just need to do some thinking on it but definitelly a great suggestion!

  46. Reply December 11, 2018 / 04:57 fadzSiteGround Team

    is this best working for all types of hosting package?coz i dont have d memcached and dynamic cache enable in my hosting package and im currrently with wprocket pro

    • Reply December 11, 2018 / 06:54 Hristo PandjarovSiteGround Team

      The Dynamic Caching and Memcached are only supported on GrowBig and above accounts. StartUp plans can use the rest of the functionality without any issues.

  47. Reply December 12, 2018 / 23:04 Abby BuzonSiteGround Team

    Hello, Can you tell me what SG Optimizer does for Startup/Reseller plans? I was told by support that it doesn't do anything other than for HTTPS. Is that still true with this new version? If that statement was not fully correct, can you explain what the benefits are to the plugin for Startup & Reseller plans? Thank you!

    • Reply December 13, 2018 / 00:58 Hristo PandjarovSiteGround Team

      Someone got mixed up from the customer care team. Actually, the plugin does a lot for your website even on StartUp plans without Dynamic caching. It adds functionality for Leverage Browser Caching, Gzip Compression, Image Optimization, HTML, CSS, JS Minification and Lazy Load for your images. All this combined should give you great performance boost.

  48. Reply December 13, 2018 / 16:08 RalSiteGround Team

    Excellent new plug inn, quick question,
    with the new SG Optimizer, do I need to activate the Cloudflare features ( Free version )
    I have got everything enabled at SG Optimizer
    is that enough?

    again thank you for the new plug inn,

    • Reply December 14, 2018 / 09:48 Hristo PandjarovSiteGround Team

      CloudFlare is a great CDN and provides additional layer of performance optimization so both should work just fine together!

  49. Reply December 14, 2018 / 07:52 ArienSiteGround Team

    Big fan of SG! However the SG optimiser unfortunately does not work on my website. After having tried several settings it resulted in much longer loading time for my webshop. Also in backend(!) it slowed down when I wanted to see my shop. Have contacted support desk but did not get a satisfying reaction. I do not doubt the quality of the plugin, but it must be something in my website that is conflicting somewhere...Maybe in a few months I will try again.

    • Reply December 19, 2018 / 06:32 Hristo PandjarovSiteGround Team

      Please, update the SG Optimzier to the latest version and disable other performance plugins. It should work faster than everything else!

  50. Reply December 16, 2018 / 09:38 matt hurtsSiteGround Team

    İ have migrated my sites to siteground WP hosting and this is the best hosting of all.

  51. Reply December 17, 2018 / 04:35 ZoniSiteGround Team

    What would be great is to have the option to enable and disable the optimizer features like minifying CSS on separate pages like how WP Rocket has it. Because from my experience some of my pages get affected badly from these features and I don't want to disable for all of my pages.

    Keep up the great work, the image optimization feature is great!

    • Reply December 18, 2018 / 04:10 Hristo PandjarovSiteGround Team

      Thanks for the suggestion, we will consider adding a box to each post type that allows you to exclude all optimizations from this item.

  52. Reply December 19, 2018 / 03:02 JordiSiteGround Team

    Does the plugin also include optimization of images to modern image formats such as webp

    • Reply December 19, 2018 / 06:19 Angelina MichevaSiteGround Team

      Hi Jordi,

      We have already considered the SG Optimizer to support WebP format and our plan is to include it in the future versions of the plugin.

  53. Reply December 19, 2018 / 21:24 Grace ChanSiteGround Team

    I have the warning below. What do I do?

    "Important warning from SG Optimizer plugin: We have detected that there is duplicate functionality with other plugins installed on your site: Really Simple SSL. Please note that having two plugins with the same functionality may actually decrease your site's performance and hurt your pages loading times so we recommend you to leave only one of the plugins active."

    • Reply December 20, 2018 / 03:35 Angelina MichevaSiteGround Team

      Hi Grace,

      The message you have seen alerts you that you have a plugin with functionality matching the SG Optimizer. In such cases keeping both of them active may result in slower loading time for your website. As the SG Optimizer is a complete performance solution we recommend to disable the other plugin and take advantage of the full benefits of the features in our plugin.
      We will be happy to answer any questions you may have about using the plugin we're available 24/7 via the Support Center in your client area.

      • December 20, 2018 / 13:09 BrianSiteGround Team

        That's not a solution (and rather bad advice). Really Simple SSL is a very well tested plugin with over 2 million active installs and a 5 star rating.

        When I turn off the option to use https in SG Optimizer there should be no conflict, therefore, no error message.

      • December 21, 2018 / 02:59 Hristo PandjarovSiteGround Team

        If you're using the SG Optimizer and forcing SSL there's absolutely no need to use the Really Simple SSL plugin. In addition to that, we've intentionally split the HTTPS config into two parts - configuration and enforcing. The second part is necessary only when there are some hardoced resources in your theme or plugins(what Really Simple SSL actually does). The error message is shown after the initial installation / update to the new version and you have to dismiss it. Once you do that, you will not see it again.

  54. Reply December 26, 2018 / 04:07 RonaldSiteGround Team

    I am using the SG Optimizer in combination with the classic editor plugin. When I update content via the classic editor then after the editor is reloaded it shows the old (cached) content. After I press the Purge SG Cache link the classic editor shows the updated content. I have excluded the /wp-admin/ part from caching but this does not help. Do you know what can cause the content of the classic editor to be cached and how I can disable the caching of the classic editor? Thank you.

    • Reply December 27, 2018 / 09:32 Angelina MichevaSiteGround Team

      Hi Ronald,

      It is best to submit a ticket with regard to this issue so our techs can replicate it and investigate what is causing the problem. They are available 24/7 via the Support center in your client area.

  55. Reply January 3, 2019 / 07:47 Ben TranSiteGround Team

    I have amember script installed, and SG Optimizer breaks this.

    How can this be fixed? As I temporarily stopped using SG Optimizer.


    • Reply January 4, 2019 / 04:43 Hristo PandjarovSiteGround Team

      Please, open a ticket in your Help Desk with detailed instructions on how to recreate it on our end, my colleagues will forward it to me and we will see what exactly is causing the issue.

  56. Reply January 3, 2019 / 10:23 samSiteGround Team

    Lazy loading is great!

    Is there any option to exclude certain images from lazy loading?

    Our website contain tabbed content and images inside these tabs are not displayed when switching between tabs. User must start scrolling in order to display images.

    • Reply January 4, 2019 / 04:40 Hristo PandjarovSiteGround Team

      Yes, we plan on adding advanced mode with the ability to exclude ceretain HTML elemets from lazy loading 🙂

      • January 7, 2019 / 09:35 SAMSiteGround Team

        Hristo, could you please give us an approximate ETA on when this will be implemented?
        We are currently testing third party plugins and would love to wait if the feature is coming soon.

      • January 7, 2019 / 10:20 Hristo PandjarovSiteGround Team

        Not right now but in few months it should happen.

  57. Reply January 4, 2019 / 03:07 AndrewSiteGround Team

    I really don't understand what the new version does because when I configure all the options including css and js minification the results in google speed tests remain the same? No improvement at all. When I try using autoptomize I do get slightly better results.

    • Reply January 4, 2019 / 04:48 Hristo PandjarovSiteGround Team

      The reason is that Google Pagespeed test bypasses our caching. Check your site speeds with your browser's dev tools -> networking tab and measure your actual loading times 🙂

  58. Reply January 5, 2019 / 09:40 HaamedSiteGround Team

    Hi, great plugin, I like it so much, and I just want to mention when I activate CSS or JS minify my website will broke, somehow it doesn't work with astra theme or even wpocean wordpress theme. Have you notice this before?

    • Reply January 7, 2019 / 02:29 Hristo PandjarovSiteGround Team

      Some themes have issues with minification of CSS, JS or HTML. Check which ones work for your site and just keep the ones that cause issues disabled. Unfortunatelly, not every theme and plugins combination can be minified without problems. Some designs are simply structured in a way that doesn't work well with minification processes.

  59. Reply January 5, 2019 / 16:05 Alexander S. KunzSiteGround Team

    Hello, thanks for the update and the new functionality - it's terrific what SG does for WordPress users. I have a question about the image optimization: does it strip the metadata from the images? I would like to keep my EXIF and IPTC metadata, most importantly the copyright information, in tact. EWWW image optimizer has a setting for that so I'd like to know what SG does. Thanks!

    • Reply January 7, 2019 / 02:25 Hristo PandjarovSiteGround Team

      We strip that data off images but it's a great idea to add an option to keep it. Thanks for your feedback, it's highly appreciated!

      • November 3, 2019 / 06:54 John NadeauSiteGround Team

        Hi Hristo,

        Alexander Kunz posted a question back on January 5th, 2019:
        "I have a question about the image optimization: does it strip the metadata from the images? I would like to keep my EXIF and IPTC metadata, most importantly the copyright information, in tact. EWWW image optimizer has a setting for that so I'd like to know what SG does."

        You had replied:
        "We strip that data off images but it's a great idea to add an option to keep it. Thanks for your feedback, it's highly appreciated!"

        I think the plugin version at that time was around 5.0.2, and of course it's up to version 5.3.6 now.

        Before I pull the trigger and utilize your "Existing Images Optimization" function, just curious if the option to keep the the data was added at anytime and is included in the latest SG Optimizer ?

      • November 5, 2019 / 03:02 Hristo PandjarovSiteGround Team

        I am afraid not yet. Generally, EXIF and IPTC metadata should not be part of your design images. Unfortunatelly, it's a bit tricky to distinguish images used in the design and such as content so if you want to keep that information, please don't enable this optimization.

  60. Reply January 8, 2019 / 06:56 babyuserSiteGround Team


    Just setting up the new plugin and have a couple of suggestions/ requests.

    I am sure your image optimiser is brilliant. But I had a bad experience with another plugin and am not keen to use it without some sort of trial. It would be great to be able to test it on a couple of images and retain the option to not use it on specific images.

    Also the memcacher is not available on multisites. I don't think this is a plugin issue per se, but it limits the usefulness of the plugin and makes me wonder what I am missing out on?


    • Reply January 9, 2019 / 01:40 Hristo PandjarovSiteGround Team

      Thanks for your feedback, we constantly improve our interfaces and the functionality of the plugin and we will definitelly take it into consideration for future updates.

      However, note that Memcached does work for Multisite. You just have to enable it as Network Admin since it is option that's on or off for the entire site.

  61. Reply January 8, 2019 / 10:08 BenSiteGround Team

    I have just removed the functional (but super annoying and sometimes resource hungry) WP Smush, and enabled the Image Optimization settings in SG Optimizer.

    There was little information i could find as to weather SG Optimizer will the same or similar job as the free version of Smush, but its one less plugin to update, one less button, and one less annoyance.

    I did however click the button under "Existing Images Optimization" and was greeted with a "We are optimizing your images, please be patient, this process may take some time."

    This is great, but theres a couple of suggestions i would like to make to this..

    First of all, some form of numerical feedback would be great. WP Smush provided a great deal of information, including how much space was actually saved, and an overall percentage. While that was pretty, it may or may not be practical in terms of resources/speed, so i understand that not being the immediate approach for SG Optimizer. But something would be nice.

    Even something as simple as 100+, 50+, 10+ files left to process. Or even a "Still processing, last checked at 12:34pm". Basically, it would be great to know if the process really is still in progress (i notice 2 others had issues with status/feedback), and hasn't stalled. It would be even better to have a rough idea of how long it was going to take, or how much further it had to go.

    My second suggestion is a little more basic. In WP Smush (at least the free version), "Bulk Smushing" of existing images can only occur if you leave the browser window open. If you closed the window or navigated elsewhere, the process would stop rather than continuing in the background. For everyone who migrates from WP Smush, this is something they are familiar with.

    It isn't clear if "Existing Images Optimization" will continue running in the background once you start it, or if you need to leave the page open. Navigating away from the page and returning seems to suggest it will.

    It would be great to have an additional message explaining this, like "You can navigate away from this page. The process will continue in the background".

    With all that said, this plugin is already far more than it was when we first installed it. We switched hosting providers a few times before landing on siteground a few months ago, and had some initial hiccups with SG Optimizer.

    It's great to see how far the plugin has come, and very reassuring that updates and features keep coming. Keep up the great work 🙂

    • Reply January 9, 2019 / 01:46 Hristo PandjarovSiteGround Team

      Thanks for the great feedback and kind words! We will most definitelly take it into consideration for our upcoming updates!

  62. Reply January 10, 2019 / 07:32 TechiSiteGround Team

    Hi There, is your new plugin compatible with the Content builder "Trive Architect" from Thrive Themes?

    • Reply January 10, 2019 / 09:52 Hristo PandjarovSiteGround Team

      It is compatible with all well-written themes and builders. I haven't tested with that combination specifically though.

  63. Reply January 14, 2019 / 00:58 TECHISiteGround Team

    Here is what Thrive Themes says:
    "ALSO IMPORTANT! Because Thrive Architect is creating lines of code behind each action you take, it’s incredibly important that you disable minification for logged in users! Minification can clash with any plugin, not just ours!"

    Do you offer such an option to exclude minification for logged in users? When minification is "“is the process of removing all unnecessary characters from source code without changing its functionality”." and SG optimizer is shortening the code for logged in users, then it would destroy the whole website.

    In 3W total cache there is a switch where it is possible to turn off / on the optimization for logged in users. It would be fantastic, if you took care about this as well for all of us content builder users.

    • Reply January 15, 2019 / 00:53 Hristo PandjarovSiteGround Team

      Thanks for the feedback, we will look into it!

      • February 20, 2019 / 06:58 TECHISiteGround Team

        Do you have any update if I can use it with Thrive Architect?

      • February 26, 2019 / 00:43 Hristo PandjarovSiteGround Team

        Did you try it with the latest SGO update? We've improved a lot of things in 5.1

  64. Reply January 15, 2019 / 11:55 Stephan H.SiteGround Team

    Looks great! Any chance to see that kind of optimizer or Joomla ?

    • Reply January 17, 2019 / 06:54 Hristo PandjarovSiteGround Team

      At thist time we don't have any plans to add additional functionality to the Joomla version of the plugin.

    • Reply February 13, 2019 / 05:24 Shayan DavoodiSiteGround Team

      Yes this would be great..

  65. Reply January 17, 2019 / 14:11 Tom DupuisSiteGround Team

    Really love how SG Optimizer is becoming an all-in-one speed optimization plugin. So glad to see the new features

    Suggestions for next update:
    -Lazy loading videos/iframes
    -Database cleanup
    -Integration of multiple CDNs (with a CDN URL field)

    Then I can stop paying for WP Rocket 🙂

  66. Reply January 18, 2019 / 00:40 Tom DupuisSiteGround Team

    Last thing I noticed Hristo - in order to lazy load Gravatars, you must have the "lazy load images" option selected. But what if I don't want to lazy load images, just Gravatars? From what I see you must lazy load images in order to use the other lazy load functions.

    • Reply January 18, 2019 / 01:38 Hristo PandjarovSiteGround Team

      You need to have the main script loaded in order to lazy load Gravatars. Can't enable it just for them.

  67. Reply January 27, 2019 / 20:01 JosephSiteGround Team

    (I'm using GoGeek plan)

    I've been reading a lot about SG Optimizer and also CloudFlare, but I'm a little confused and need your professional advice @Hristo.

    1: Is the free CouldFlare account enough for using it WooCommerce? Because I can't exclude the WooCommerce Pages pages with the free version.

    2: You mentioned in here that it is possible and maybe a good idea to use both CloudFlare and SG Optimizer together with WooCommerce site. If I exclude URLs in SG optimizer would that also be excluded in CloudFlare?

    3: Is it a better idea to use ONLY SG Optimizer and NOT CloudFlare?

    4: If used both would that have negative effect on my WooCommerce site? I mean order pages cached, cart pages cached so not ideal.

    5: Does Cloudflare save orders made in WooCommerce?

    Thank you Hristo

    • Reply January 29, 2019 / 07:17 Hristo PandjarovSiteGround Team

      We have many customers using CloudFlare plus SG Optimizer. Actually, unless specified otherwise, CloudFlare will cache only your static content which means you don't need to do any exclusion of URLs whatsoever. For a standard installation you don't even need to do it on your WooCommerce store since the plugin has been designed to work with WooCommerce and will not cache the pages you've mentioned. CloudFlare is a CDN, if you have a local site, targeting your country, I would keep it off. On the other hand, if you're targeting more than one country with it, enabling CloudFlare is a great idea.

  68. Reply January 30, 2019 / 21:05 DrakeSiteGround Team

    This new version of the plugin is much better, thank you for developing it and maintain it.
    Regarding CSS and JS combining I understand your point about HTTP2, but sometimes combine some very small CSS and JS created by plugins could be really helpful, if you know what you are doing.
    Therefore, please consider to add this "advanced" feature in future to have more flexibility.
    In addition it happened that sometime minification break the functionality of some plugins, and it would be really nice have the possibility to granularity exclude some of them.

    • Reply January 31, 2019 / 05:00 Hristo PandjarovSiteGround Team

      In the upcoming version update we will provide additional functionality to combine CSS files and to defer JS scripts on separate options plus additional optimizations!

      • February 12, 2019 / 23:59 GiliSiteGround Team

        Can't wait for the next version 🙂 An option to defer JS/CSS and combine CSS would be great! thank you for the great plugin.

      • February 15, 2019 / 01:48 Hristo PandjarovSiteGround Team

        Both added in 5.1 just some more testing 🙂

  69. Reply February 13, 2019 / 05:58 Janice SullivanSiteGround Team

    When I go to the cpanel I don't see this option for me in the Dynamic Cache? Is it because I have Cloudflair?

    • Reply February 15, 2019 / 01:54 Hristo PandjarovSiteGround Team

      It's in the SuperCacher tool 🙂

  70. Reply February 13, 2019 / 10:23 Chris HutchesonSiteGround Team

    I am getting "Bad Gateway 502 - cloud flare error messages rather than my site homepage when using the plugin. Any suggestions? Running the most current version of WordPress, but can't update to PHP 7.1 because of plugin incompatibility/


    • Reply February 15, 2019 / 01:55 Hristo PandjarovSiteGround Team

      Please, post a ticket in your help desk. Looks like a security plugin blocking the Optimizer requests.

  71. Reply February 13, 2019 / 19:18 Ying Jae LinSiteGround Team

    When will the SG Optimizer be able to support Memcached for WordPress Multisite environment? Any time map? Thanks

    • Reply February 15, 2019 / 01:56 Hristo PandjarovSiteGround Team

      It already does support multisite. Please, look at the plugin's official and tutorial page.

  72. Reply February 13, 2019 / 20:04 RachelSiteGround Team

    I just installed this plugin and received the following error message: "Important warning from SG Optimizer plugin: We have detected that there is duplicate functionality with other plugins installed on your site: Really Simple SSL. Please note that having two plugins with the same functionality may actually decrease your site's performance and hurt your pages loading times so we recommend you to leave only one of the plugins active."

    • Reply February 15, 2019 / 01:56 Hristo PandjarovSiteGround Team

      Yes, duplicate functionality is bad. You can delete Really Simple SSL and force HTTPS using the SG Optimizer.

  73. Reply February 14, 2019 / 13:50 ShannonSiteGround Team

    I loved this plugin - it works much better than what I am currently using. However, it seemed like it didn't get along well with the Divi theme. Divi is fairly popular, specifically with those of us who aren't strong programmers.
    Thank you anyway.

    • Reply February 15, 2019 / 01:57 Hristo PandjarovSiteGround Team

      Plugin works fine with Divi, please post a ticket in your Help Desk if you're experiencing issues so we can look into it 🙂

  74. Reply February 17, 2019 / 15:54 markSiteGround Team

    using latest version of your plugin and my experience has ben good. however, a few questions:

    1. i am using autoptime+async javascript. as such, i disabled all sg-optimizer frontend optimizations. do you recommend this setup or should i use ONLY sg-optimizer?

    2. currently, i have smush deactivated and sg-optimizer compressing my images. however, as of yesterday [even after purging all caches] it seems as if sg-uptimizer is never going to finish optimizing my site's images. it's been 2 days now.... any thoughts?


    • Reply February 18, 2019 / 02:14 Hristo PandjarovSiteGround Team

      In the upcoming update 5.1 we will introduce Async JS load and CSS combination so you won't need any other plugin! As for the image optimization, please check if you have your WordPress cron enabled. It's designed to work slow but steady in order to avoid extensive resources usage. If it's on, please post a ticket in your Help Desk, so we can look into it.

  75. Reply February 18, 2019 / 23:43 Angel G ZinselSiteGround Team

    Hi Hristo, great job done with the SGOptimizer including image optimization and the rest of new features!

    Is already supporting WebP format for high WPO like shortpixel does? If not do you have an estimaed date for this release?

    I have a GOGeek account, but some customers of mine are using GRowBig or even StartUp accounts. Is there a comparative table with which features of SGOptimizer are available in every product?

    Also, Is Elementor and elementor Pro fully supported?

    Thx in advance

    • Reply February 19, 2019 / 01:32 Hristo PandjarovSiteGround Team

      We're launching 5.1 with CSS Combination, JS Async load and WooCommerce support for Lazy Load features. WebP requires additional updates on some systems and we've planned to add it in the upcoming updates. It's on the roadmap but won't get into the next release. The Optimizer works on StartUp too, they just don't get the dynamic cache. Thinking in that direction too. As for your other question, yes, Elementor is fully supported.

  76. Reply March 13, 2019 / 09:55 RachelSiteGround Team

    Hi Hristo, My hosting is with SG and I've been told I need to use your optimiser. I have several websites but one is very image heavy and is loading really slowly. I cannot use the 7+PHP because my theme doesn't support those. I used to use Imsanity along with some other optimiser plugins but now only SG optimiser. Can I reinstall imsanity or anything else to get my site working faster again? - it went wrong recently when some change at the SG end was made and I had to change the PHP settings in Cpanel as a result. But now it is really slow and that is a disaster.

    • Reply March 14, 2019 / 06:59 Hristo PandjarovSiteGround Team

      It seems you're duplicating functionality. Could you make me an admin account with hristo.p [at] and shoot me an email. I will look into your site and make sure you're getting the best speed out of your theme.

  77. Reply March 18, 2019 / 11:36 CrystalSiteGround Team

    Hi Hristo,

    Thanks so much for this great update and all the information - you have been very generous with your time providing answers to everybody.

    I would kindly ask that you update your documentation and PDF guide to reflect these new updates. I was not aware of these updates and was using your documentation and PDF guide and so suggested that my client purchase shortPixel and was about to embark on the long journey of the 21 steps when this update does most of this automatically.



    • Reply March 19, 2019 / 01:13 Hristo PandjarovSiteGround Team

      Thanks for the feedback and the kind words, Crystal! Yes, I will update the ebook soon 🙂

  78. Reply March 25, 2019 / 02:57 Daniel BrownSiteGround Team

    Hi Hristo, Please advise. I enabled all Lazy Load Images on SG Optimizer, but still Google PageSpeed Insights showing error "Defer offscreen images - Consider lazy-loading offscreen and hidden images..."
    Please advise why still I am getting this error of Lazy Load Images?

    • Reply March 26, 2019 / 04:43 Hristo PandjarovSiteGround Team

      You need to look into your Google PageSpeed report and examine the exact issues reported. Images can be rendered by different ways, the test might be reporting false positives, etc.

      • March 29, 2019 / 18:39 Daniel BrownSiteGround Team

        Thank for your reply. I check / test again the site on Google PageSpeed and I see that the error "Defer offscreen images..." appearing only on mobile test. On desktop NO error. It's can be that Lazy Load Images of SG Optimizer, only working for desktop and not for mobile? Please advise.

      • April 1, 2019 / 06:20 Angelina MichevaSiteGround Team

        Hi Daniel,
        Please submit a ticket for this issue so we can investigate in more details the outcome you are seeing. We can also suggest you check the forum of the plugin for discussions on this topic and other users' input about it.

  79. Reply May 24, 2019 / 21:25 Michael WellsSiteGround Team

    Recently, our site started to get "504 Gateway Timeout" error messages on the backend when logging in. When "memcached" was disabled in the SG Optimizer plugin the problem went away.

    Apparently memcache was using too much memory for normal processing of other processes to complete in the 120 second default server timeout delay. Why memcache should create this problem is unclear as a feature that is supposed to speed up delivery is in fact slowing it down. Perhaps there is an incompatibility with another plugin but I do not know how to debug this problem properly. In any case memcache seems incompatible with our site at present. Any ideas?

    • Reply May 27, 2019 / 07:50 Hristo PandjarovSiteGround Team

      That's how Memcached works, if the size of the slab is too big than the memory pool it has available you will get the issue you've described. I would recommend to upgrade on a Cloud account and request our team to configure Memcached as per the needs of your site. It seems that it needs more memory for the Memcached service.

  80. Reply June 10, 2019 / 05:36 ChristianSiteGround Team


    great plugin.
    How to cache SEA landing pages?
    Each user arrives with a unique gclid parameter.
    So each URL ist "new" and doesn't hit the cache.
    How to cut off the query params?


    • Reply June 11, 2019 / 02:47 Hristo PandjarovSiteGround Team

      I am afraid that at this point we don't support that. It's on the roadmap though and we will be able to exclude global parameteres like the ones for Google ads and Facebook.

  81. Reply July 3, 2019 / 01:12 SjardoSiteGround Team


    Any updates about the release of WebP support? I would love to serve WebP images, and dislike to get another service into work to support this.

  82. Reply July 8, 2019 / 08:33 Simon MüllerSiteGround Team

    I am also interested in any news of the WebP support. Would be really amazing to have it built into SG Optimizer!

  83. Reply July 16, 2019 / 09:07 DonSiteGround Team

    We are getting an error notification from SiteGround that our current W3 Total Cache WordPress plugins are not compatible with PHP 7.1 and we are thinking of pivoting to the SG Optimizer. Is the plugin comparable?

    We are helping an orphan client that no longer speaks with their web designer? We are hopeful that the switch will not cause dramatic issues with the site. Our plan is to make a backup, deactivate W3, and then make the conversion. Would this be the best course of action in your opinion?

    • Reply July 17, 2019 / 05:32 Hristo PandjarovSiteGround Team

      You can update to 7.1 safely. We will add W3TC to the exclude list. That aside, I would recommend switching completely to SG Optimizer since it now provides everything you need to optimize your site for best performance.

  84. Reply August 1, 2019 / 12:37 FernySiteGround Team

    Any updates on the WebP support? Eagerly waiting on the update for this 🙂


    • Reply August 1, 2019 / 23:56 Hristo PandjarovSiteGround Team

      Soon, it's in the roadmap. However, I can't give you exact ETA at the moment.

      • September 10, 2019 / 07:09 Charlie SasserSiteGround Team

        I noticed that WPEngine has a manual way to support webp by manually creating another file with the same name in the same WP directory and then asking support to create a NGINX rule to pick the webp version if it is compatible with the requesting browser. See article at . I use both WPE and SG. Love them both.

      • September 11, 2019 / 05:48 Angelina MichevaSiteGround Team

        Hello Charlie,

        Thanks for sharing this. We're glad to hear you are happy with our services. Regarding webp we wanted to let you know we're working on that for the SG Optimizer and it's in our plans to include it in future releases.

      • September 11, 2019 / 06:32 Charlie SasserSiteGround Team

        @angelina | On an individual account can SG create a NGINX rule if we manually create a .webp version of the image in exactly the same WP directory with say the exact name as a png file like example.png and example.png.webp so the rule will pick the .webp version if the client browser supports .webp?

      • September 11, 2019 / 07:56 Angelina MichevaSiteGround Team

        At the moment it will not be possible to do that on your SiteGround account. Instead, you can add htaccess rules to check whether there is .webp version of the image and use it in the place of the generic file. As mentioned previously we aim to include this in future releases of the plugin and thus make it available for our customers.

  85. Reply August 21, 2019 / 11:49 WardSiteGround Team

    Has there been any testing to determine if SG Image optimization works better / worse / same as Imagify, Smush, and others. I like the idea of consolidation but only if there's a benefit. if there's no testing done, can you elaborate on the different processes used so we know SG method vs Imagify/Smush/etc.

    • Reply August 22, 2019 / 04:45 Hristo PandjarovSiteGround Team

      We've selected what we believe are the best optimization services and use them in the most efficient way. I havent tested against other free and paid services but image optimization is pretty much established technology and there isn't anything that the above mentioned plugins can do signifficantly better.

  86. Reply October 22, 2019 / 13:21 Matt WilliamsSiteGround Team

    This is a great little plugin. It does all the things that GTMetrix wants EXCEPT it does not do "Defer Parsing of Javascript." Any chance this well be added?

    • Reply October 23, 2019 / 00:58 Hristo PandjarovSiteGround Team

      It does 🙂 Please, update the plugin to the latest version and check the Frontend Optimization tab.

  87. Reply November 7, 2019 / 06:51 John NadeauSiteGround Team


    Just a few more questions:

    1) Were you able to run your comparisons on your Image Optimization feature vs ShortPixel or Cloudflare's Polish and/or others?

    2) Do you have a pre-test feature to see what an image looks like before/after optimization?

    3) After Optimizing prior images, does your plugin generate a report of pre/post image sizes? Even an overall total of MB before and MB after would be interesting.


    • Reply November 8, 2019 / 03:45 Hristo PandjarovSiteGround Team

      I am afraid the answer is no to all the questions. However, we're working in that section and soon there will be a lot of updates regarding image optimization!

  88. Reply December 11, 2019 / 05:23 John NadeauSiteGround Team


    Just noticed Version 5.3.8 came out with "Improved image optimization process". Can you elaborate here, or point to a link?



    • Reply December 11, 2019 / 06:54 Hristo PandjarovSiteGround Team

      The optimization used to stall in certain cases which we fixed. This is a maintenance release, we hope to launch a new major update with tons of new features in the first couple of weeks of January. Will probably write a blog post about it too.

      • December 12, 2019 / 06:23 John NadeauSiteGround Team

        That's Great! Where can we sign up for alerts about your new blog posts? Thanks.

      • December 16, 2019 / 07:25 Hristo PandjarovSiteGround Team

        We will redesign our blog soon and you will be able to do that!

  89. Reply January 28, 2020 / 07:29 Gary BrettSiteGround Team

    Hi there, using Sitegrounds excellent features such as supercache & SG optomizer but no so great reports from GTMetrix & Pingdom.

    I then Installed autoptomize plugin and shaved 3 seconds off the load time and 94% score which is great. Only downside is every day I have to manually clear the autoptomize cache as its too big.

    Thinking of replacing that with WP Rocket, my question if I may, why is there such an increase using external plugins as opposed to Sitegrounds own. Where possible Id like to use your own but page speed is stopping me at the moment?

    • Reply January 29, 2020 / 01:25 Hristo PandjarovSiteGround Team

      There is nothing in Autoptimizer that you can't do in the SG Optimizer plugin. Check out the latest improvements we've added to it, especially in the frontend tab. Last but not least, use the cache test functionality in SG Optimizer to make sure that your caching is properly set and working.

Reply to Hristo Pandjarov Cancel

* (Required)