All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=775464

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=e15b3929b73776a865b8f202175db8d09fe59d8dbff421ab0e925d3252590e8c


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

chromium-rel-mac11
chromium-rel-mac11-pro

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8965489457083048320

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

Suspected Commit
  Author : Ehsan Chiniforooshan
  Commit : c77b44ebb53886e039c8471548c2050cceceda59
  Date   : Tue Oct 10 18:12:10 2017
  Subject: tracing: TracingController -> Coordinator

Bisect Details
  Configuration: mac_10_11_perf_bisect
  Benchmark    : v8.runtimestats.browsing_desktop
  Metric       : API:duration_avg/browse_news/browse_news_flipboard
  Change       : 9.41% | 15.225 -> 16.6575

Revision             Result                   N
chromium@507702      15.225 +- 0.649444       6      good
chromium@507716      15.1207 +- 0.417168      6      good
chromium@507717      16.735 +- 0.411633       6      bad       <--
chromium@507718      16.7372 +- 0.749503      6      bad
chromium@507720      17.0462 +- 1.13683       6      bad
chromium@507723      16.8397 +- 0.426203      6      bad
chromium@507729      16.8288 +- 0.803423      6      bad
chromium@507756      16.7263 +- 0.422828      6      bad
chromium@507809      16.6575 +- 0.587943      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.news.flipboard v8.runtimestats.browsing_desktop

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8965489457083048320


For feedback, file a bug with component Speed>Bisection