You switched to better hosting. Or you're paying good money for it already. And yet, your Core Web Vitals are still orange. Maybe even red. So... was the hosting a waste of money?No. But it was never going to be the whole story either. Let's break down what hosting can fix, what it can't, and how to find out which one is holding your shop back.
Core Web Vitals are great at telling you how a page performs. But they do not always tell you when a specific part of that page became available to users.
If you've ever wondered who's behind the technical side of RUMvision, it's Erwin. CTO, co-founder, Google Developer Expert, and international speaker. He built version 1.0 during his paternity leave, in the hours when his daughter Hannah was asleep. Four years later, with 2.0 now live, his role is changing. And that's precisely what he wanted.
RUMvision v5 is a broader tracking architecture update focused on more reliable data collection, improved SPA navigation cleanup, better beacon handling and closer alignment with modern browser APIs, while leaving older compatibility layers behind.
It is a common web performance headache: you have optimized your hero images and streamlined your CSS, but your LCP scores are still stuck in the "yellow" zone. Often, the bottleneck isn't the file size- it is the order in which the browser decides to download it.
Single Page Applications have always been a bit of an awkward fit for Core Web Vitals. And not because SPAs are inherently slow.
Sunshine, coding, webperformance and knowing your Core Web Vitals issues without clicking? What a life!
Health Checks analyze your real user data and turn it into clear, actionable insights. Instead of spending time hunting for performance issues yourself, RUMvision now finds them for you. Spend less time hunting and more time fixing issues.
Super proud moment, RUMvision 2.0 is LIVE 🎉 It has taken a lot of hard work, a lot of talking, and - most importantly - a lot of listening to our clients. But this new version truly puts the "vision" into RUM. Let us tell you what we've build and how it can help your business.
Karlijn is the person who translates web performance into something everyone can understand. She's CEO and co-founder of RUMvision, co-chair of the W3C RUM Community Group, board member of Mage-OS NL, and the one who coined SUX (Sitespeed User Experience). Because good SUX sells.She speaks at conferences across the world, sits at the table with Google and other browser vendors, and runs a company with her husband. She also spent this morning vacuuming the office before this interview.
Roderik is the one thinking three steps ahead, turning technical possibilities into business models. He’s our co-founder and oversees business development, business administration, partnerships, and marketing strategy, but you probably won’t see him on stage or in your inbox. Next to RUMvision, he’s been running his own marketing company since 2009.
We’re launching a new version of RUMvision. Our 2.0 model is a rebuilt foundation with new features we’ve been working on for months. Here’s what that means for you.
Tracking parameters are useful for marketing attribution, but they quietly introduce a caching problem across the web. Browsers treat URLs with different query parameters as separate resources, even when the underlying page content is identical.
I’m the co-owner, manage customer success, and the person you’ll probably talk to first when you start using RUMvision. But did you know: four years ago, I was selling organic tea from home?
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.
Speculative loading is one of the few techniques that can fundamentally change how fast a website feels. And a new kid on the block got introduced: prerender_until_script
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!