November 2020 – [[WM:TECHBLOG]]

https://upload.wikimedia.org/wikipedia/commons/thumb/4/40/On_the_road%2C_Death_Valley_%2823702938504%29.jpg/1024px-On_the_road%2C_Death_Valley_%2823702938504%29.jpg

Wikimedia’s CDN: the road to ATS

The 2nd of a 3 part series that describes some of the changes to Wikimedia’s Content Delivery Network, including the replacement of Varnish with Apache Traffic Server (ATS) as the on-disk HTTP cache component of the CDN.

Web performance case study: Wikipedia page previews

Preview popups are common and requires careful scripting and styling; they can generate useful learning about performance as a reference for other front-end tasks.

This bot is judging you: here’s how we made it better at it

After two years of planning and migration work, the 3rd generation WP 1.0 web tool has launched! Learn more about how it happened and what it means for Wikipedia’s editors.