All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=705403

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgrJ29sQoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgrJXQ4goM


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/8983986847650182704

=== Auto-CCing suspected CL author ksakamoto@chromium.org ===

Hi ksakamoto@chromium.org, 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 : ksakamoto
  Commit : 3246896976ad46a095ef679b2421528536848059
  Date   : Thu Mar 23 09:28:28 2017
  Subject: Shorten the network 2-quiet window of FirstMeaningfulPaintDetector

Bisect Details
  Configuration: mac_10_11_perf_bisect
  Benchmark    : system_health.common_desktop
  Metric       : timeToFirstContentfulPaint_avg/browse_social/browse_social_twitter
  Change       : 84.65% | 245.840666667 -> 453.949166665

Revision             Result                  N
chromium@459028      245.841 +- 44.5425      6      good
chromium@459029      246.091 +- 32.5663      6      good
chromium@459030      461.097 +- 65.4879      6      bad       <--
chromium@459031      455.279 +- 59.9194      6      bad
chromium@459033      480.478 +- 32.5472      6      bad
chromium@459038      465.529 +- 61.2276      6      bad
chromium@459047      468.742 +- 64.2773      6      bad
chromium@459065      461.28 +- 68.0615       6      bad
chromium@459102      453.949 +- 56.266       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 system_health.common_desktop

Debug Info
  https://chromeperf.appspot.com/buildbucket_job_status/8983986847650182704

Is this bisect wrong?
  https://chromeperf.appspot.com/bad_bisect?try_job_id=5258233662406656


| O O | Visit http://www.chromium.org/developers/speed-infra/perf-bug-faq
|  X  | for more information addressing perf regression bugs. For feedback,
| / \ | file a bug with component Speed>Bisection.  Thank you!

This is not a real regression but a metrics bug. See  bug 706671 .