All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=758921

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=c8f895ea8c8bc23f92da7be51f8f9d2b6464659268b97edeb85a433d4b216a41


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

android-nexus7v2

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8970292022245977040

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

Hi bcwhite@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 : Brian White
  Commit : 7662ff8cb53121cd4d8916007d430b36efd45895
  Date   : Thu Aug 24 00:03:13 2017
  Subject: Validate histograms before and after each task on Android.

Bisect Details
  Configuration: android_nexus7_perf_bisect
  Benchmark    : thread_times.key_silk_cases
  Metric       : thread_other_cpu_time_per_frame/http___mobile-news.sandbox.google.com_news_pt0?swipe
  Change       : 160.12% | 0.904445743146 -> 2.35265010684

Revision             Result                     N
chromium@496667      0.904446 +- 0.34436        6      good
chromium@496809      1.14733 +- 1.12556         9      good
chromium@496845      0.980377 +- 0.391796       6      good
chromium@496863      0.928337 +- 0.474311       6      good
chromium@496872      0.876611 +- 0.0959793      6      good
chromium@496876      0.982091 +- 0.414371       6      good
chromium@496877      0.978626 +- 0.450857       6      good
chromium@496878      2.62885 +- 1.12421         6      bad       <--
chromium@496880      3.04048 +- 0.53917         6      bad
chromium@496950      2.35265 +- 2.02868         6      bad

To Run This Test
  src/tools/perf/run_benchmark -v --browser=android-chromium --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests --story-filter=http...mobile.news.sandbox.google.com.news.pt0.swipe thread_times.key_silk_cases

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8970292022245977040


For feedback, file a bug with component Speed>Bisection

 Issue 758952  has been merged into this issue.

This is expected.  The CL (https://chromium-review.googlesource.com/619272) is part of an important investigation into a core trampler (#736675 and #744734).  It will be reverted as soon as a Canary can be built to gather information from the field.

 Issue 758955  has been merged into this issue.

 Issue 758958  has been merged into this issue.

 Issue 758960  has been merged into this issue.

 Issue 758961  has been merged into this issue.

 Issue 758967  has been merged into this issue.

 Issue 758973  has been merged into this issue.

 Issue 758974  has been merged into this issue.

 Issue 758976  has been merged into this issue.

 Issue 759048  has been merged into this issue.

 Issue 758992  has been merged into this issue.

 Issue 759101  has been merged into this issue.

 Issue 759104  has been merged into this issue.

 Issue 759030  has been merged into this issue.

Issue 758887 has been merged into this issue.

Issue 758908 has been merged into this issue.

The offending CL has been reverted (according to plan).
https://chromium-review.googlesource.com/c/chromium/src/+/636165

Issue 758959 has been merged into this issue.

Issue 758945 has been merged into this issue.

 Issue 759556  has been merged into this issue.

 Issue 759558  has been merged into this issue.

 Issue 759467  has been merged into this issue.

 Issue 760172  has been merged into this issue.

 Issue 760517  has been merged into this issue.

 Issue 760680  has been merged into this issue.

 Issue 759609  has been merged into this issue.

 Issue 759645  has been merged into this issue.