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Perf Matters at Wikipedia in 2019

Looking back at our ups and downs.

Long exposure of highway with downtown skyscraper in the background of an unidentified city. There are green grass hills on both sides and a bright moon in the sky.

Perf Matters at Wikipedia in 2016

Looking back at our ups and downs.

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.

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.