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Issue 751155 link

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Issue metadata

Status: Duplicate
Merged: issue 750227
Owner: ----
Closed: Aug 2017
Cc:
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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111.2% regression in thread_times.simple_mobile_sites at 489814:489867

Project Member Reported by sullivan@chromium.org, Aug 1 2017

Issue description

See the link to graphs below.
 
All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=751155

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=cdb4e0067eb1b9fc1024aefaf70c065532e4fff47b095dd1742f04c7d0894cd4


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

android-nexus7v2
Mergedinto: 750227
Status: Duplicate (was: Untriaged)

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

Suspected Commit
  Author : Charles Harrison
  Commit : 7847afc23c816960a019476e995c696143365cac
  Date   : Thu Jul 27 01:15:34 2017
  Subject: Remove the DocumentWriteEvaluator

Bisect Details
  Configuration: android_nexus7_perf_bisect
  Benchmark    : thread_times.simple_mobile_sites
  Metric       : thread_other_cpu_time_per_frame/http___www.nyc.gov
  Change       : 111.63% | 0.147717911995 -> 0.312612204359

Revision             Result                      N
chromium@489813      0.147718 +- 0.00945919      6      good
chromium@489820      0.145148 +- 0.00453178      6      good
chromium@489824      0.144917 +- 0.00333832      6      good
chromium@489825      0.285014 +- 0.15023         6      bad       <--
chromium@489826      0.294437 +- 0.159413        9      bad
chromium@489827      0.314239 +- 0.00714061      6      bad
chromium@489840      0.312111 +- 0.00842625      6      bad
chromium@489867      0.312612 +- 0.0112962       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...www.nyc.gov thread_times.simple_mobile_sites

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8972445722367250448


For feedback, file a bug with component Speed>Bisection

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