All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=749336

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=2329111e4a7203f513533c213d63e8d27bd16f3bf2197da125f55be45f7db353


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

android-nexus7v2
android-one
android-webview-nexus6
chromium-rel-mac-retina
chromium-rel-mac11
chromium-rel-win7-gpu-ati
chromium-rel-win8-dual

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8972961306095430112

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

Suspected Commit
  Author : Naina Raisinghani
  Commit : fd7f99c9125b7f9b054b3a32c0100b526792f74c
  Date   : Mon Jul 24 05:21:35 2017
  Subject: Remove code and tests using StyleSharing

Bisect Details
  Configuration: android_webview_nexus6_aosp_perf_bisect
  Benchmark    : blink_perf.shadow_dom
  Metric       : v1-large-shallow-layout/v1-large-shallow-layout
  Change       : 32.43% | 44.0383333333 -> 58.3205

Revision             Result                   N
chromium@488905      44.0383 +- 1.16714       6      good
chromium@488912      43.4762 +- 0.702036      6      good
chromium@488914      43.8973 +- 0.879343      6      good
chromium@488915      56.3337 +- 1.52088       6      bad       <--
chromium@488916      56.1843 +- 0.623515      6      bad
chromium@488919      56.8797 +- 1.74051       6      bad
chromium@488932      58.0593 +- 1.34995       6      bad
chromium@488959      58.3205 +- 0.837761      6      bad

To Run This Test
  src/tools/perf/run_benchmark -v --browser=android-webview --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests blink_perf.shadow_dom

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8972961306095430112


For feedback, file a bug with component Speed>Bisection