Monthly Archives: April 2023

Using the User Timing API to Record Custom Performance Metrics

We have always had some form of testing metric. Back in the day we used things like the window.onload event or something similar. Then we started getting more sophisticated with TTFB, FCP, etc. Finally, along came CWVs, which continue to grow and evolve. But sometimes you just need to measure something that isn’t covered by all of these. And that’s where the User Timing API comes in. Happy reading! Continue reading