Category Archives: lang:en

Blogposts on blog.futtta.be in English (mostly because these posts are republished in a non-Dutch-speaking context).

Autoptimize CSS defer switching to loadCSS (soon)

Historically Autoptimize used its own JS-implementation to defer the loading of the main CSS, hooking into the domContentLoaded event and this has worked fine. I knew about Filament Group’s loadCSS, but saw no urgent reason to implement it as I saw no big advantages vs. my homegrown solution. That changed when criticalcss.com’s Jonas contacted me, pointing out that the best way to load CSS is now using the rel="preload" approach, which as of loadCSS 1.3 is also the way loadCSS works;

<link rel="preload" href="path/to/mystylesheet.css" as="style" onload="this.rel='stylesheet'">

As rel="preload" currently is only supported by Chrome & Opera (both Blink-based), a JS polyfill is needed for other browsers which uses loadCSS to load the CSS. Hopefully other browsers catch up on rel="preload" because it is a very elegant solution which allows the CSS to load sooner then with the old code while still being non-render blocking. What more could one which for (“Unicorns” my 10yo daughter might say, but what does she know)?

Anyways; I have integrated this new approach in a separate branch on GitHub, you can download the zip-file here to test this and all the other fixes and improvements since 2.1.0. Let me know what you think. Happy preloading!

No REST for the wicked

After the PR-beating WordPress took with the massive defacements of non-upgraded WordPress installations, it is time to revisit the point-of-view of the core-team that the REST API should be active for all and that no option should be provided to disable it (as per the decisions not options philosophy). I for one installed the “Disable REST API” plugin.

Lykke Li – No Rest For The Wicked

Watch this video on YouTube.

How to make Autoptimize (even) faster

Less blogposts here lately, mostly because I’m doing custom Autoptimize-development for a partner (more on that later) and because I get a lot of support-questions on the wordpress.org support forums (with approx. between 1500-2000 downloads/ weekday that is to be expected). One of the more interesting questions I got there was about Autoptimize being slow when JS optimization was active and what would be the cause of that. The reply is of interest for a larger audience and is equally valid for CSS optimization;

Typically the majority of time spent in Autoptimize is mainly in the actual minification of code that is not minified yet (purely based on filename; if the filename ends in .min.js or -min.js).

So generally speaking, the way to avoid this is;
1. have a page cache to avoid requests triggering autoptimize (as in that case the cached HTML will have links to cached CSS/JS in it)
2. for uncached pages; make sure AO can re-use previously cached CSS/ JS (from another page), in which case no minification needs to be done (for that you will almost always want to NOT aggregate inline JS, as this almost always busts the cache)
3. for uncached CSS/ JS; make sure any minified file is recognizable as such in the filename (e.g. .min.css -min.js), this can lighten the minification-load considerably (I’ll add a filter in the next version of AO so you can tell AO a file is minified even if it does not have that in the name).

So based on this, some tips;
* make sure you’re not aggregating inline JS
* for your own code (CSS/ JS); make sure it is minified and that the filename confirms this. if you can convince the theme’s developer to do so, all the better (esp. the already minified but big wp-content/themes/bridge/js/plugins.js is a waste of precious resources)
* you could try switching to the legacy minifiers (see FAQ) to see if this improves performance
* you can also check if excluding some un-minified files from minification helps performance (e.g. that bridge/js/plugins.js)

Music from Our Tube; Bill Evans’ Peace Piece

Although I feel time has not been kind to Laurent Garnier’s music (it sounds rather dated now, but it could just as well be me getting old), but I do love listening to his “It is what it is”-radioshow on Radio Meuh which he duefully also uploads to his SoundCloud-account. Garnier’s musical taste, which he displays in his radioshow, is that broad that every show there’s at least one song that I get all excited about. This time it’s a solo improvisation from Bill Evans from back in 1958, titled “Peace Piece”. So beautiful!

Bill Evans "Peace Piece"

Watch this video on YouTube.