The WebKit team has rolled out a notable change in the 26.2 beta with support for two major performance APIs. This update moves Safari significantly closer to full Core Web Vitals support.
Your ad clicks are landing on slow pages. Your first-time visitors are bouncing. And your Core Web Vitals dashboard isn't showing you any of this - let's dive into the world beyond the 75th percentile. And not make it a snoozefest.
Web performance improvements often come from small, incremental gains. Better caching, fewer requests, smaller files. Every once in a while though, a new platform feature shows up that makes you pause and think: why has this not been mainstream already?
What fun is being a Real User Monitoring tool if you can't pull up real data and wrap it - 2025 style! Worst third-parties, silliest faces (including Jordy's ill-advised moustache) most occuring platforms + countries in our dataset and MUCH more
The story behind our migration with real-world benchmarking, reindexing 8.3 billion documents, our collaboration with Elastic, and the 20 to 140× speed gains our users now experience.
Black Friday is just around the corner! What can you do to make sure your users experience is optimal? Allow us to share 9 quick-wins to make sure you do not miss out on conversions or brand loyalty in the long run. Almost no coding required!
Eight lessons learned from rumming thousands of Magento shops. Like setting you all a challenge to aim for the 90th percentile, speculation rules rule, use-cases and.. a sneak preview into RUMvision 2.0!
At Friday 17th of October, the 4th edition of SyliusCon took place. I travelled to Lyon to give a talk on Core Web Vitals debugging via DevTools.
Mozilla Firefox has just shipped support for Interaction to Next Paint (INP), one of Google’s Core Web Vitals metrics focused on responsiveness. This is great news for anyone monitoring site speed and user experience.
At Friday October 10th, the second edition of SEO Benelux took place. I travelled to Antwerp to talk about different sitespeed tools.
All roads lead to Rome, but it was our first time giving a talk in Italy. And it was a great succes! Want to find the slides, read about our Baseline integration, the Zitmaxx use case or how to improve webperformance for Hyvä, you find al the resources here.
At RUMvision, our focus is helping site owners make their sites faster. To do that well, we depend on the data browsers give us through APIs. Some of those APIs are already incredibly useful — but not all browsers support them consistently.
For years, site owners have been using Subresource Integrity (SRI) as a way to ensure that third-party scripts can’t be tampered with. However, keeping your script up to date is one of its challenges.
If you’ve been tracking real user performance, you probably already know: Chrome has long supported largest contentful paint (LCP), but Safari until now did not. That’s starting to change, and it’s a big deal if you rely on rumvision for insights.
Moin Kiel! I was happy to get everyone up to speed debugging and optimizing Core Web Vitals with RUM + DevTools. Looking for the slides? Here you go!
On July 18th I got to talk about about webperformance, while shipping and sipping at Mollie's biggest developer meetup yet! Here you find the slides.
Many agencies struggle with performance conversations because they rely on synthetic testing alone. Here's how Real User Monitoring changes the game and what we've learned communicating these insights to clients.
On June 10th 2025 I gave my talk "Why your pagespeed score is lying to you". In this you'll find the slidedeck, more info on how to improve the webperformance of your Magento shop and even info on a special we're running!
"Your site is slow" – four words no Hyvä developer wants to hear, yet only 51% of Hyvä shops achieve good Core Web Vitals scores. After years of optimizing Magento performance, we've identified the common issues preventing stores from reaching their full potential. In this guide, we'll explain not just what to fix, but why things fail in the first place. Your journey to better Core Web Vitals – and happier customers – starts here.
What happens to ecommerce when the lights go out? On April 28, 2025, a massive power outage hit Spain and Portugal just before noon. We combined electricity demand data with our own data, how others experienced it and the impact of an outage on ecommerce and non-ecommerce.