https://chromium.googlesource.com/chromium/src/+/master/docs/speed/bisects.md
https://chromium.googlesource.com/chromium/src/+/master/docs/speed/bot_health_sheriffing/how_to_launch_a_functional_bisect.md

https://chromeperf.appspot.com/

The docs don't match the chromeperf UI for launching a bisect. E.g. the docs show "performance" and "functional" options, but the UI has "mean" and "return_code" options.