lang:en

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

Radiohead 2025 jukebox

by

As a long-time Radiohead fan I was happy to see video of their first gig in many years and although did enjoy the set I don’t have the feeling I’m missing out on anything really. Great songs, great musicians but nothing new, nothing really unexpected (not counting a couple of songs that they only very rarely perform live).

I watched the vid and then switched to a The Smile live show from 2024 and (although) it’s very different and -to me- a lot more relevant than what Radiohead is doing now which (to me) seems “just” a rehash of past greatness maybe?

Radiohead - FULL SHOW - live Madrid 2025-11-04 night 1 European Tour complete concert
Watch this video on YouTube.

Opt-out of LinkedIn’s AI scheme now (last day Nov. 3rd 2025)

by

If you prefer your content/ data not to be used to train LinkedIn’s AI, you can opt out at https://www.linkedin.com/mypreferences/d/settings/data-for-ai-improvement (but only until tomorrow, Nov 3rd?).

Crazy that this requires an explicit opt-out by the way, it really should be opt-in (so off by default).

More info about this can be found at tweakers.net by the way.

Feel free to share 😉

Improving LCP the wrong way

by

Performance hack seen on a customer site; fix the bad LCP (due to an animation in revslider) by loading an inline (base64’ed) png image which according to FF is broken and later in the rendering process hiding & removing it.

Even though that image is not *really* used, tools such as Google Pagespeed Insights pick it up as the LCP image and the score is “in the green”.

Not sure this is really helping performance (spoiler: it’s not), but Pagespeed is happy and so is the customer. Crazy!

Heads-up: Autoptimize Pro price increase for 2025

by

It’s been 2 years since AOPro was launched and a lot has happened in that time; bugs were squashed, improvements were made and some great features were added. Taking that into account on one hand and increasing costs from suppliers on the other: prices will see a smallish increase as from 2025 (exact amounts still to be determined)

But rest assured; if you already signed up, you will continue to pay the lower price, also when renewing. Same if you sign up before the end of the year too by the way, so if you’re considering switching on Autoptimize’s Pro features, now might be the moment! 🙂

Whatever you do, if you’re an Autoptimize users or not, if you’re an AOPro customer or not, have a great end of year! Peace and love to you and your loved ones, whomever you may be!

CookieYes? No thanks!

by

I just reviewed the performance of a customer’s WordPress site. Things got a lot worse he wrote and he assumed Autoptimize (he was a AOPro user) wasn’t working any more and asked me to guide him to fix the issue.

Instead it turns out he installed CookieYes, which adds tons of JS (part of which is render-blocking), taking 3.5s of main thread work and (fasten your seat-belts) which somehow seems to increase DOM size to over 60K elements in this case.

I knew cookie consent solutions can have a performance impact, but this? Thanks but no thanks!

AOPro 2.3: delay all JavaScript

by

As of Autoptimize Pro 2.3 there is an option to delay all JavaScript. Delaying can have a bigger positive performance impact then asyncing or deferring because AOPro will only load the delayed JS after a to be defined delay or (better even) only at the moment user interaction (such as swiping/ scrolling or mouse movement) is noticed.

Obviously when delaying all JS you might want to be able to exclude and that is possible as well; you might want add data-cfasync there for example as contrary to Autoptimize’s normal behavior for deferring, delaying ignores attributes like data-cfasync, meaning that if you want to leave such JS untouched you will have to add it to the exclusion list yourself.

Lastly; if your site’s above the content depends on JavaScript to render correctly (which has serious performance impacts), delaying all JS would result in the page not rendered entirely, so test and exclude as required.

AOPro 2.2: delaying iframes (and other improvements)

by

I released AOPro 2.2 today and the main new feature is the ability to delay the loading/ rendering of iFrames. Despite the fact iFrames can be lazy-loaded (using browser-native loading=lazy attribute), in reality this does not always work in WordPress, hence the new “delay iFrames” option on the Pro Boosters tab.

  • How it works: a delayed iFrame has no src but a data-src attribute. Upon user interaction (or a timeout as also specified on the Boosters settings) the src will be set. If the iFrame is a YouTube, Vimeo or Dailymotion video, AOPro will load the video thumbnail as a placeholder.
  • How you can activate it: by default no iframe is delayed, if you want to have e.g. YouTube video’s delayed add youtube.com to the “delay iFrames” option.
  • What’s next: this is a “minimal viable product”, but depending on user feedback I might incorporate some of WP YouTube Lyte’s functionality for video iFrames. Tell me what you think in the comments!

Apart from delaying iFrames, AOPro 2.2 also has;

  • new under the hood logic to improve the speed at which Critical CSS rules are generated and visible
  • if you are “removing CSS/ JS” then the logic change this at a per page/ post level has changed; if you want one page NOT to remove CSS/ JS, just enter none in the “Autoptimize this page” metabox. If you leave the field empty the default “removals” apply. If you put something else in there then that overrides the default removals.
  • The ShortPixel Adaptive Images JavaScript component was updated to version 1.1.

HTTP/2; do not aggregate? Well, maybe …

by

Ever since the advent of HTTP/2 people asked if they still needed JS/ CSS files to be combined and indeed by default aggregation is off in Autoptimize. But based on this interesting article by Harry Roberts, “bundling is here to stay for a while”. So when in doubt; test performance with and without aggregating CSS/ JS ideally both on mobile and desktop bandwidth profiles and learn which works best for your site! 🙂

When lazyloading iframes does (not) work (automatically)

by

WordPress has made some good progress to speed up site rendering the last couple of years and part of this is thanks to images and iframes having the “loading” attribute with value “lazy”, telling browsers these can be loaded later allowing other (more important) assets to take priority. Especially iframes can consume a lot of bandwidth (think embedded Google Maps or one or more YouTube videos), so the performance impact of lazyloading those can be very significant.

Unfortunately one cannot always rely on WordPress core to automatically make sure there is no performance penalty from stuffing your site with iframes. Here is a non-exhaustive list of when iframes will still delay your site:

  1. WordPress core does not always add the loading="lazy" attribute;
    1. if loading="eager" is set (which means load asap)
    2. if no width & height are set (as lazyloading iframes without those could cause layout shifts)
  2. Firefox (and some less important browsers) does not support lazyloading iframes even if loading="lazy" is set
  3. iframes in or near the “above the fold” part of a page are loaded immediately, even if loading="lazy" is set

Conclusion; show restraint when adding iframes; adding an image of Google Maps which links to (a separate page with) Google Maps is almost always as informative and the performance benefit of using an image instead of an GMaps iframe is huge. And when using iframes then consider using alternative solutions to avoid the performance impact (for YouTube you might want to give WP YouTube Lyte a try).