Tracking down slow event handlers with Event Timing
We’re taking part in the ongoing Event Timing Chrome origin trial, in order to experiment with that API early and give feedback to its designers.
Tag: RUM
Performance perception: Correlation to RUM metrics
When we set out to ask Wikipedia visitors their opinion of page load performance, our main hope was to answer an age-old question: which RUM metric matters the most to users? And more interestingly, which ones matter the most to our users on our content.
Performance perception: How satisfied are Wikipedia users?
We’ve recently published research on performance perception that we did last year. The micro survey used in this study is still running on multiple Wikipedia languages and gives us insights into perceived performance.
Evaluating Element Timing for images
In the search for a better user experience metric, we have tried out the upcoming Element Timing for Images API in Chrome.
Magic numbers
Should we be skeptical of performance guidelines which state that 100 milliseconds feels instantaneous to everyone?
Best friends forever
We use both synthetic and RUM testing for Wikipedia. These two ways of testing performance are best friends and help us verify regressions. Today, we will look at two regressions where it helped us to get metrics both ways.
Mobile web performance: the importance of the device
Let’s explore our web performance data from an angle we haven’t explored before: mobile device type.
Measuring Wikipedia page load times
Here is how we measure and interpret load times on Wikipedia. Let’s also look at what real-user metrics are, and how percentiles work.