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Issue 758961 link

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Issue metadata

Status: Duplicate
Merged: issue 758921
Owner: ----
Closed: Aug 2017
Cc:
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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50.6% regression in system_health.common_mobile at 496668:496950

Project Member Reported by kraynov@chromium.org, Aug 25 2017

Issue description

See the link to graphs below.
 
Project Member

Comment 1 by 42576172...@developer.gserviceaccount.com, Aug 25 2017

All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=758961

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=89e303dc1cdd0ddb0852b5b4358367b305925abe136802fb7977308b7367b9a4


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

android-nexus7v2
Project Member

Comment 3 by 42576172...@developer.gserviceaccount.com, Aug 25 2017

Mergedinto: 758921
Status: Duplicate (was: Untriaged)

=== 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    : system_health.common_mobile
  Metric       : timeToFirstMeaningfulPaint_avg/browse_news/browse_news_cricbuzz
  Change       : 25.44% | 545.206642857 -> 683.924285714

Revision             Result                  N
chromium@496667      545.207 +- 49.8477      6      good
chromium@496809      555.969 +- 102.188      6      good
chromium@496845      535.887 +- 59.7043      6      good
chromium@496863      514.335 +- 117.633      6      good
chromium@496872      551.27 +- 64.7088       6      good
chromium@496876      555.121 +- 58.0162      6      good
chromium@496877      545.268 +- 78.0179      6      good
chromium@496878      667.542 +- 126.835      6      bad       <--
chromium@496880      725.743 +- 120.969      6      bad
chromium@496950      683.924 +- 134.101      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=browse.news.cricbuzz system_health.common_mobile

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8970286644088302560


For feedback, file a bug with component Speed>Bisection

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