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Issue metadata

Status: Duplicate
Merged: issue 661927
Owner: ----
Closed: Nov 2016
Cc:
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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5.2%-18.8% regression in page_cycler_v2.intl_ja_zh at 429276:429321

Project Member Reported by primiano@chromium.org, Nov 3 2016

Issue description

See the link to graphs below.
 
Mergedinto: 661927
Status: Duplicate (was: Untriaged)

===== BISECT JOB RESULTS =====
Status: completed


===== SUSPECTED CL(s) =====
Subject : Add crash keys to TaskQueueManager::ProcessTaskFromWorkQueue
Author  : alexclarke
Commit description:
  
We suspect a bad task closure is getting posted and would like to
add crash keys to aid diagnosis.

BUG=660427

Review-Url: https://codereview.chromium.org/2464853002
Cr-Commit-Position: refs/heads/master@{#429285}
Commit  : c08c078b27b353f4ab8de7deccfb862270b1ff2a
Date    : Wed Nov 02 15:49:06 2016


===== TESTED REVISIONS =====
Revision         Mean     Std Dev   N  Good?
chromium@429275  69.9274  0.633787  5  good
chromium@429281  70.8746  0.612339  5  good
chromium@429284  70.6832  0.530595  5  good
chromium@429285  88.0024  0.625219  5  bad    <--
chromium@429286  86.2246  0.928215  5  bad
chromium@429287  84.0708  3.53972   5  bad
chromium@429298  86.6404  1.61563   5  bad
chromium@429321  85.7942  1.16795   5  bad

Bisect job ran on: win_8_perf_bisect
Bug ID: 661952

Test Command: src/tools/perf/run_benchmark -v --browser=release --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests page_cycler_v2.intl_ja_zh
Test Metric: timeToFirstContentfulPaint_avg/pcv1-warm/http___kakaku.com_
Relative Change: 22.69%
Score: 99.9

Buildbot stdio: http://build.chromium.org/p/tryserver.chromium.perf/builders/win_8_perf_bisect/builds/2272
Job details: https://chromeperf.appspot.com/buildbucket_job_status/8997020029042909296


Not what you expected? We'll investigate and get back to you!
  https://chromeperf.appspot.com/bad_bisect?try_job_id=4559040212893696

| 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 Tests>AutoBisect.  Thank you!

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