Last modified: 2014-05-23 02:46:15 UTC
It'd be good to have interfaces in core for using ResourceTiming and other client-side performance APIs to capture data about site performance. The MultimediaViewer extension already has a lot of the desired functionality in mmv.performance.js. We should integrate it into core.
Related Multimedia card: https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/579