Pagespeed findings

    • ± 2 minutes

    GTmetrix says it's outdated and will use Core Web Vitals

    Earlier I wrote why to use PageSpeed Insights instead of GTmetrix, but this might not be accurate anymore by the end of the month. GTmetrix announced they will be moving to using Core Web Vitals as well.

    • ± 4 minutes

    Webflow and Core Web Vitals

    Webflow was founded in 2012 and is an online visual editor platform allowing users to design, build and launch websites. Does this mean you can't get high PageSpeed scores? And what about the newest Core Web Vitals?

    • ± 2 minutes

    Why isn't HTTP/2 improving the pagespeed score

    Sometimes a LinkedIn post of mine is leading to new questions as well. This time: "How do you get a high PageSpeed score when a site is using HTTP/2?"

    • ± 3 minutes

    Why your Wordpress site is not accessible

    Some (WP) agencies are really into accessibility. However, when you do support accessibility as a developer, but not really pay close attention, there is a big chance you are unknowingly building inaccessible Wordpress websites for your clients.

    • ± 4 minutes

    7 steps for building web accessible hamburger menu's

    Accessibility is like privacy: it often isn't the core business of a company. Even menu's become the victim. As a result, some might never be able to reach or interact with your main navigation.

    • ± 1 minute

    WCAG 2.1 translated by Accessibility Foundation

    Being a recommendation since June 5th, 2018, the Web Content Accessibility Guidelines 2.1 got translated to Dutch and published by Accessibility Foundation.

    • ± 8 minutes

    Does 5G make my sitespeed issues go away?

    Recently, when discussing pagespeed optimizations within a platform migration, I was asked if fiber internet or 5G will make sitespeed issues go away, or just making it worse.

    • ± 2 minutes

    How faster internet resulted in slower sites and webshops

    During the years 2011 through 2019, 4g coverage spread from 5% to 79% of the world. During that same time period, the median average JavaScript transfer size to mobile devices increased by 611%, from 52kb to 372.9 KB.

    • ± 1 minute

    Native image lazyloading support

    Browsers are always trying to optimize as well. Some browsers already support lazyloading of images and iframes, using the loading attribute.

    • ± 3 minutes

    Preloading with care

    Resource hints or preloading is hot, I see it more and more in an attempt to (allegedly) improve website/shop performance, by preloading some assets.

    • ± 3 minutes

    Fast, accessible and data-saving websites

    Although most of my work is pagespeed-related, I also like to address web accessibility and carbon emission when doing R&D for our website-producing CMS.

    • ± 3 minutes

    Encrypting DNS query bad for performance?

    DNS over HTTPS, Mozilla and Chrome already started experimenting with this a while back, to encrypt the last part of web traffic that isn't secure yet by default. But what really is the impact on privacy, security, as well as performance?

    • ± 3 minutes

    Slides of Tweakers frontend performance talk

    Last Thursday, I spoke at the sold out Tweakers Developers Summit. I talked about performance with a bit of conversion/UX/SEO/AMP and PWA.

    • ± 4 minutes

    CSS Critical Path in Magento 1

    Last Thursday, January 16th, I joined TJ Gamble's livestream to answer some PageSpeed related questions. Critical CSS was one of the subjects. Just before the livestream, I published a code snippet to auto-enable CSS critical Path within Magento 1.

    • ± 17 minutes

    PWA, the untold story impacting your conversion

    Progressive Web Apps have quite some advantages. The biggest one being a web-product with a native-like feeling. But it is also fast and mobile first, or rather should be. This is the untold story about PWA, impacting your conversion.