All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=814195

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=1cbb928a34c59a680b972554ce5a354b6391f336709fee323d28c84313f66a61


Bot(s) for this bug's original alert(s):

android-one
chromium-rel-mac12

📍 Pinpoint job started.
https://pinpoint-dot-chromeperf.appspot.com/job/16d88987840000

📍 Couldn't reproduce a difference.
https://pinpoint-dot-chromeperf.appspot.com/job/16d88987840000

📍 Pinpoint job started.
https://pinpoint-dot-chromeperf.appspot.com/job/16dfa917840000

📍 Found a significant difference after 1 commit.
https://pinpoint-dot-chromeperf.appspot.com/job/16dfa917840000

[test_env.py] Warm up vpython virtualenv cache on swarming task shards. by iannucci@chromium.org
https://chromium.googlesource.com/chromium/src/+/8348d507e280f4bd02a7737bf5577f838d64437e

Understanding performance regressions:
  http://g.co/ChromePerformanceRegressions

Hm... this one was reverted a while ago (and just relanded ~20 min ago)

This was originally reverted in https://chromium.googlesource.com/chromium/src/+/7dde857919af2f59fcab10264d696301a15c64da

(and you can see in the original graph that the perf regression sticks around WAYYYYYY after that commit)

Please do not assign it to the perf sheriff we're only on rotation for a couple of days.

📍 Pinpoint job started.
https://chromeperf.appspot.com/job/12f12900440000

📍 Found a significant difference after 1 commit.
https://chromeperf.appspot.com/job/12f12900440000

[test_env.py] Warm up vpython virtualenv cache on swarming task shards. by iannucci@chromium.org
https://chromium.googlesource.com/chromium/src/+/8348d507e280f4bd02a7737bf5577f838d64437e

Understanding performance regressions:
  http://g.co/ChromePerformanceRegressions

+dtu, can you add this to the list of bisects to re-run when we can patch over breakages?

These all recovered. If we need to find the culprit, we can re-run bisect with https://chromium-review.googlesource.com/c/chromium/src/+/922581 pinned.