How to get alerted to significant regressions and incidents at scale without getting overwhelmed by false positives? In this talk I present a few lessons learned while building an alerting system based on Real User Monitoring (RUM) data.
Oct 29, 2025 | Performance.sync() Meetup in AmsterdamReal User Monitoring (RUM) is key to find problems on a site and watch for regressions — and doing so is hard enough. But what if you have to monitor hundreds or thousands of websites? It takes a team of experts to build the right tools to do that.
Nov 13, 2024 | Performance.sync() Meetup in AmsterdamSoftware. The Web. The Cloud. People tend to think of digital as being limitless or non-physical. But the Internet is the biggest machine ever built – and it has a huge impact on our environment. How can we as web developers help make IT more sustainable? What would enable us to do more?
Jan 31, 2024 | Online lecture for FH Salzburg, AustriaThe Internet is the biggest machine ever built – and it has a huge impact on our environment. How can we as perf experts help make IT more sustainable? What would enable us to do more?
Nov 01, 2023 | Performance.now() Pre-Event Meetup in AmsterdamI explain the new Core Web Vital Interaction to Next Pain (INP) and share some tricks on how to debug and improve it.
Jun 22, 2023 | Hamburg Web Performance Group Meetup in HamburgYou go to a website and start reading the text as soon as it appears. But then the web font loads and the rest of the content shifts. How annoying! In this talk, we’ll go over how to adjust system fonts to reduce layout shift.
Mar 23, 2023 | Hamburg Web Performance Group Meetup in Hamburg