Knowledge and cases

    • ± 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.

    • ± 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

    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.

    • ± 8 minutes

    Chromium: badge of shame for slow loading websites?

    Twitter exploded when Chromium announced it. Chromium is describing it as "Moving towards a faster web", which is a clear signal towards digital agencies and other websites builders. What to expect?

    • ± 3 minutes

    Light weight websites with Save-Data header

    We all use JS, custom fonts, images and maybe even video's within our website or webshop. We can now reduce our load and speed up article- or product pages based on user preferences.

    • ± 1 minute

    Belsimpel's productpage pagespeed

    A better perceived performance and thus user experience, will result in higher conversion and thus revenue.

    • ± 2 minutes

    Optimizing e-commerce supplier and cost efficiency

    You want your e-commerce to use most supplier-efficient and cost friendly delivering process. At the same time, you want to keep calculations and thus memory outbursts to a minimum.

    • ± 3 minutes

    Improving a webshop productpage pagespeed

    Before helping an e-commerce company with improving their pagespeed, sometimes I create a proof of concept first. By doing this, stakeholders will get a better grasp of what can be achieved in real life.

    • ± 2 minutes

    Performance metrics: LCP replacing FMP

    First Meaningful Paint is one of the six performance metrics tracked and displayed by Lighthouse. It measures when the primary content of a page is visible, but is more of a guess. It became time for a new metric.

    • ± 3 minutes

    Boost web performance with www domain prefix

    You might want to publish your (new) website or webshop on the www-prefix of your domain. This will decrease network latency, when doing it the other way around for your images, making your online business even faster.

    • ± 4 minutes

    8 reasons why you're doing SEO wrong

    If you are a professional Web Performance Optimizer (WPO), or if you are simply someone who cares about online performance and pagespeed, chances are that you are doing these performance optimisations wrong.

    • ± 4 minutes

    Defer unused CSS @ Google's Lighthouse

    The biggest challenge under the former PageSpeed Insights test has been completely annulled as the PageSpeed Insights uses the Lighthouse engine nowadays.