Category Archives: performance

How to LYTE-n up your WooCommerce video’s

So you have a WooCommerce shop which uses YouTube video’s to showcase your products but those same video’s are slowing your site down as YouTube embeds typically do? WP YouTube Lyte can go a long way to fix that issue, replacing the “fat embedded YouTube player” with a LYTE alternative.

LYTE will automatically detect and replace YouTube links (oEmbeds) and iFrames in your content (blogposts, pages, product descriptions) but is not active on content that does not hook into WordPress’ the_content filter (e.g. category descriptions or short product descriptions). To have LYTE active on those as well, just hook the respective filters up with the lyte_parse-function and you’re good to go;

if (function_exists('lyte_parse')) {

And a LYTE video, in case you’re wondering, looks like this (in this case beautiful harmonies by David Crosby & Venice, filmed way back in 1999 on Dutch TV);

David Crosby & Venice – Guinevere | 2 Meter Sessions | 1999

Watch this video on YouTube.

Autoptimize 2.4 beta 3 includes image optimization!

We’re finalizing work on Autoptimize 2.4 with beta-3, which was just released. There are misc. changes under the hood, but the main functional change is the inclusion of image optimization!

This feature uses Shortpixel’s smart image optimization proxy, where requests for images are routed through their URL and automagically optimized. As the image proxy is hosted on one of the best preforming CDN’s with truly global presence obviously using HTTP/2 for parallelized requests, as the parameters are not in a query-string but are part of the URL and as behind the scenes the same superb image optimization logic is used that can also be found in the existing Shortpixel plugin, you can expect great results from just ticking that “optimize image” checkbox on the “Extra” tab :-)

Image optimization will be completely free during the 2.4 Beta-period. After the official 2.4 release this will remain free up until a still to be defined threshold per domain, after which additional service can be purchased at Shortpixel’s.

If you’re already running AO 2.4 beta-2, you’ll be prompted to upgrade. And if you’d like to join the beta to test image optimization, you can download the zip-file here. The only thing I ask in return is feedback (bugs, praise, yay’s, meh’s, …)  ;-)


New: Autoptimize Power-Up released!

The Autoptimize Power-up has just been released to the plugin repository!

This plugin integrates with and extends Autoptimize. It integrates with, a premium service which uses a “headless” browser to extract real critical CSS. That way it  fully automates the extraction of high-quality critical CSS and the creation of rules for that critical CSS. It can work 100% automated, but also allows semi-automated jobs (where you enter a URL for which you want a specific rule, the power-up will do the rest) and manual rules (where you create the rule and add critical CSS yourself).

Taking over Async JavaScript WordPress plugin

David Clough, author of the Async JavaScript WordPress plugin contacted me on March 5th to ask me if I was interested to take over ownership of his project. Fast-forward to the present; I will release a new version of AsyncJS on March 13th on, which will:

  • integrate all “pro” features (that’s right, free for all)
  • include some rewritten code for easier maintenance
  • be fully i18n-ready (lots of strings to translate :-) )

I will provide support on the forum (be patient though, I don’t have a deep understanding of code, functionality & quirks yet). I also have some more fixes/ smaller changes/ micro-improvements in mind (well, a Trello-board really) for the next release, but I am not planning major changes or new functionality. But I vaguely remember I said something similar about Autoptimize a long time ago and look where that got me …

Anyway, kudo’s to David for a great plugin with a substantial user-base (over 30K active installations) and for doing “the right thing” (as in not putting it on the plugin-market in search for the highest bidder). I hope I’ll do you proud man!

Want to test automated Critical CSS creation?

Over 3 years ago Autoptimize added support for critical CSS and one and a half year ago the first “power-up” was released for Critical CSS rules creation.

But time flies and it’s time for a new evolution; automated creation of critical CSS, using a deep integration with using their powerful API! A first version of the plugin is ready and the admin-page looks like this (look to the right of this paragraph);

The plan:

  1. beta-test (asap)
  2. release as separate plugin on (shooting for April)
  3. release as part of Autoptimize 2.5 (target mid 2018)

This new “” power-up has been tested on a couple of sites already (including this little blog of mine) and we are now looking for a small group of to help beta-test for that first target.  Beta-testers will be able to use for free during the test (i.e. for one month). If you’re interested; head on up to the contact form and tell me what kind or site you would test this on (main plugins + theme; I’m very interesting in advanced plugins like WooCommerce, BuddyPress and some of the major themes such as Avada, Divi, Astra, GeneratePress, … ) and I’ll get back to you with further instructions.


Introducing zytzagoo’s major changes for Autoptimize 2.4

[UPDATE 29/03/2018: Autoptimize 2.4 can now be downloaded from and will automatically update so ensure all new functionality and fixes are applied]

TL;DR Autoptimize 2.4 will be a major change. Tomaš Trkulja (aka zytzagoo) has cleaned up and modernized the code significantly, making it easier to read and maintain, switched to the latest and greatest minifiers and added automated testing. And as if that isn’t enough we’re also adding new optimization options! The downside: we will be dropping support for PHP < 5.3 and for the “legacy minifiers”. AO 2.4 will first be made available as a separate “Autoptimize Beta” plugin on via GitHub and will see more releases/ iterations with new options/ optimizations there before being promoted to the official “Autoptimize”.

Back in March 2015 zytzagoo forked Autoptimize, rewriting the CDN-replacement logic (and a lot of autoptimizeStyles::minify really) and started adding automated testing. I kept an eye on the fork and later that year I contacted Tomas via Github to see how we could collaborate. We have been in touch ever since; some of his improvements have already been integrated and he is my go-to man to discuss coding best practices, bugfixes and security.

FFWD to the nearby future; Autoptimize 2.4 will be based on Tomaš’ fork and will include the following major changes:

  • New: option only minify JS/ CSS without combining them
  • New: excluded JS- or CSS-files will be automatically minified
  • Improvement: switching to the current version of JSMin and -more importantly- of YUI CSS compressor PHP port which has some major performance-improvements of itself
  • Improvement: all create_function() instances have been replaced by anonymous functions (PHP 7.2 started issuing warnings about create_function being deprecated)
  • Improvement: all code in autoptimize/classlesses/* (my stuff) has been rewritten into OOP and is now in autoptimize/classes/*
  • Improvement: use of autoload instead of manual conditional includes
  • Improvement: a nice amount of test cases (although no 100% coverage yet), allowing for Travis continuous integration-tests being done
  • dropping support for PHP below 5.3 (you really should be on PHP 7.x, it is way faster)
  • dropping support for the legacy minifiers

These improvements will be released in a separate “Autoptimize Beta” plugin soon (albeit not on as “beta”-plugins are not allowed). You can already download from GitHub here. We will start adding additional optimization options there, releasing at a higher pace. The goal is to create a healthy Beta-user pool allowing us to move code from AO Beta to AO proper with more confidence. So what new optimization options would you like to see added to Autoptimize 2.4 and beyond? :-)

[corrected 19/02; does not allow beta-plugins]

Autoptimize 2.3, the Happy New Year release

I just released Autoptimize 2.3.0, the Happy New Year release. As described here earlier it has some significant extra optimizations to help you improve your site’s performance even more for 2018:

  • new: optimize Google fonts with “combine & link” and “combine and load async” (with webload.js), intelligently preconnecting to Google’s domains to limit performance impact even further
  • new: Async JS, can be applied to local or 3rd party JS (if local it will be auto-excluded from autoptimization)
  • new: support to tell browsers to preconnect (= dns lookup + tcp/ip connection + ssl negotiation) to 3rd party domains (depends on browser support, works in Chrome & Firefox)
  • new: remove WordPress’ Core’s emoji CSS & JS
  • new: remove (version parameter from) Querystring
  • new: support to clear cache through WP CLI thanks to junaidbhura
  • lots of bugfixes and small improvements done by some seriously smart people via GitHub (thanks all!!), including a fix for AO 2.2 which saw the HTML minifier go PacMan on spaces in some circumstances.

Enjoy! :;-)