All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=847446

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=f74d6ccf2e7229a66eabe7cd2163fa77a36df260bb76c1fd049f6ff4d79ff750


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

android-webview-nexus6

📍 Pinpoint job started.
https://pinpoint-dot-chromeperf.appspot.com/job/1488d766240000

📍 Found significant differences after each of 5 commits.
https://pinpoint-dot-chromeperf.appspot.com/job/1488d766240000

Remove Document#selectedStylesheetSet/preferredStylesheetSet by cnardi@chromium.org
https://chromium.googlesource.com/chromium/src/+/62e388ac4d084b73649d99df72e651559be44077
2340 → 2364 (+23.95)

[oilpan] Enable incremental marking buildflag by mlippautz@chromium.org
https://chromium.googlesource.com/chromium/src/+/838fb3bd2db6a2869a0efc6e7e3154f954f74b70
2359 → 1835 (-523.5)

[SPv175+] Combine clips in more cases by wangxianzhu@chromium.org
https://chromium.googlesource.com/chromium/src/+/7f6fc0f6b0d391350bf6c6745514ec452873f081
1831 → 1895 (+63.88)

Remove client-provided mailbox in CopyOutputRequest by piman@chromium.org
https://chromium.googlesource.com/chromium/src/+/5406037437556eac7c164f6df41837d54feba3b8
1895 → 1875 (-19.73)

Display Cutout: Add viewport-fit descriptor by beccahughes@chromium.org
https://chromium.googlesource.com/chromium/src/+/fda642f0f944120b331a5df95ae08ea2751776d7
1861 → 1887 (+25.75)

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

We decided to go with the regressions on microbenchmarks right now as a Finich study is showing large improvements for real world. We still keep them open though as they are worth looking at for optimizing the write barrier.