All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=903126

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=abcec8703aa137a425654a9bbda81f616ac376247347d376cbeab27952e5baeb


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

linux-perf

blink_perf.css - Benchmark documentation link:
  https://bit.ly/blink-perf-benchmarks

📍 Pinpoint job started.
https://pinpoint-dot-chromeperf.appspot.com/job/11b77b2be40000

Recovered after the report but then went back again. If you are zooming out to see the history of this graph it shows a bunch of "hats" where it improves for a little while and the goes back down. Probably just a sensitive microbenchmark.

📍 Found significant differences after each of 2 commits.
https://pinpoint-dot-chromeperf.appspot.com/job/11b77b2be40000

Roll AFDO from 72.0.3585.0_rc-r1 to 72.0.3587.0_rc-r1 by chromium-autoroll@skia-public.iam.gserviceaccount.com
https://chromium.googlesource.com/chromium/src/+/f42deeeed7a4a0fb701d3643ef166cffa9a34d0b
ClassDescendantSelector: 8689 → 7312 (-1377)

Revert "AppCache: clean up WeakPtrFactory members in classes with children." by findit-for-me@appspot.gserviceaccount.com
https://chromium.googlesource.com/chromium/src/+/b796d00eeca9de093128f3117f32beb21c135ac4
ClassDescendantSelector: 7314 → 7213 (-101.2)

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

Benchmark documentation link:
  https://bit.ly/blink-perf-benchmarks