All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=776926

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=bbb437d581e80cb23e2ea716cf9794b072396f9ed4e6b2e05486634de1197a04


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

chromium-rel-win7-x64-dual

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8965185829189582336

=== 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: win_x64_perf_bisect
  Benchmark    : loading.desktop
  Metric       : cpuTimeToFirstMeaningfulPaint_avg/cold/AllRecipes
  Change       : 1.95% | 1283.58811111 -> 1305.55466667

Revision             Result                  N
chromium@509725      1283.59 +- 19.7877      9       good
chromium@509728      1283.86 +- 15.6944      6       good
chromium@509729      1289.38 +- 11.3713      6       good
chromium@509730      1307.72 +- 16.307       6       bad       <--
chromium@509735      1311.08 +- 16.6564      6       bad
chromium@509744      1304.34 +- 59.0644      14      bad
chromium@509763      1302.28 +- 41.7874      9       bad
chromium@509801      1305.55 +- 14.0192      6       bad

To Run This Test
  src/tools/perf/run_benchmark -v --browser=release_x64 --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests --story-filter=AllRecipes loading.desktop

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8965185829189582336


For feedback, file a bug with component Speed>Bisection