All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=777325

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=f2468b87201dec1802968522025a7585cc221619a0267e8cef76330e790cdd1f


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

chromium-rel-mac11

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8964954990878047024

=== BISECT JOB RESULTS ===
Perf regression found with culprit

Suspected Commit
  Author : Kunihiko Sakamoto
  Commit : 07ec68095dc07849019a7362ba6cc67625c95c0b
  Date   : Wed Oct 18 10:35:41 2017
  Subject: Simplify CSSFontFaceSource a bit

Bisect Details
  Configuration: mac_10_11_perf_bisect
  Benchmark    : v8.browsing_desktop
  Metric       : total:500ms_window:renderer_eqt:v8_max/browse_search/browse_search_google
  Change       : 26.58% | 26.1995507492 -> 33.1640463674

Revision             Result                  N
chromium@509727      26.1996 +- 4.06269      6      good
chromium@509729      26.9236 +- 4.76796      6      good
chromium@509730      33.686 +- 3.48262       6      bad       <--
chromium@509733      33.1401 +- 4.78115      6      bad
chromium@509739      34.9874 +- 6.19885      6      bad
chromium@509751      34.8008 +- 2.59011      6      bad
chromium@509775      33.164 +- 7.06542       6      bad

To Run This Test
  src/tools/perf/run_benchmark -v --browser=release --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests --story-filter=browse.search.google v8.browsing_desktop

More information on addressing performance regressions:
  http://g.co/ChromePerformanceRegressions

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8964954990878047024


For feedback, file a bug with component Speed>Bisection