All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=761734

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=5ab8348d0ebb9bdad60fe98681aa1964142d1d1ea1232b306c60eb140f1e0887


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

chromium-rel-mac11

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8969399522473063984

=== Auto-CCing suspected CL author shaseley@google.com ===

Hi shaseley@google.com, the bisect results pointed to your CL, please take a look at the
results.


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

Suspected Commit
  Author : Scott Haseley
  Commit : e8dfd2da399e98b0aacba0057a85d546ac095233
  Date   : Thu Aug 31 05:36:48 2017
  Subject: Reland: "Use swap time for first meaningful paint candidates"

Bisect Details
  Configuration: mac_10_11_perf_bisect
  Benchmark    : v8.browsing_desktop
  Metric       : v8-gc-full-mark-compactor_avg/browse_social/browse_social_twitter
  Change       : 53.68% | 4.786 -> 7.35516666667

Revision             Result                  N
chromium@498754      4.786 +- 0.242153       7      good
chromium@498760      5.10378 +- 1.43195      9      good
chromium@498763      4.7825 +- 0.116623      4      good
chromium@498764      6.76725 +- 2.32717      8      bad       <--
chromium@498765      6.63663 +- 2.93643      8      bad
chromium@498776      6.115 +- 1.55034        6      bad
chromium@498798      7.35517 +- 2.215        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.social.twitter 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/8969399522473063984


For feedback, file a bug with component Speed>Bisection

The assigned owner "shaseley@google.com" is not able to receive e-mails, please re-triage.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

Hi Shubhie, could you please assign to the responsible person? shaseley@ seems to have finished his internship.

This is not a regression, we have made the metric more accurate by capturing the cost of the rendering pipeline. So the "Regression" is WAI.