

WebPerf / WPO Tips
199 posts

@WPOtips
Useful information about Web Performance Optimisation and tips how to speed up your websites. #webperf #sitespeed // tweets by @kamilhavlicek



Cookie banners can cause web performance and Core Web Vitals issues. Check out this new article to learn about different problems and what you can do about them. debugbear.com/blog/cookie-co…

This company had Facebook #ads running... but someone forgot to add fbclid to the #caching rules, ouch. 😬 Luckily we've spotted this right away with some #realusermonitoring



After implementing "scrollbar-gutter:stable" the amount of page-views with a layout shift dropped nicely! #AimForZero #CLS #WebPerf







@blue2blond @KamilHavlicek @ChromeUXReport @philwalton 404 and other error pages are not counted. Here's the documentation on the code that does the filtering: chromium.googlesource.com/chromium/src/+…


A Shopify merchant was struggling to explain why their daily lighthouse speed scores dropped 5 days ago, despite: • NO code changes • NO new apps Can you spot when the marketing team made changes with Google Tag Manager? Lesson: Marketing ships code changes too!