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Issue metadata

Status: Duplicate
Merged: issue 722870
Owner: ----
Closed: May 2017
Cc:
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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2.3%-130.7% regression in loading.desktop at 471646:471725

Project Member Reported by tdres...@chromium.org, May 18 2017

Issue description

See the link to graphs below.
 
Project Member

Comment 3 by 42576172...@developer.gserviceaccount.com, May 18 2017

Mergedinto: 722870
Status: Duplicate (was: Untriaged)

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

Suspected Commit
  Author : Yutaka Hirano
  Commit : f20d10a747ef558a18cdd6925df977352e477997
  Date   : Mon May 15 04:44:45 2017
  Subject: Revert "Set URLResponseBodyConsumer::kMaxNumConsumedBytesInTask to 32K"

Bisect Details
  Configuration: winx64ati_perf_bisect
  Benchmark    : loading.desktop
  Metric       : timeToFirstMeaningfulPaint_avg/pcv1-cold/Daum
  Change       : 55.55% | 1497.99871429 -> 2330.18877778

Revision             Result                  N
chromium@471654      1498.0 +- 2435.91       14      good
chromium@471666      1448.81 +- 2391.19      14      good
chromium@471669      1497.63 +- 2465.73      14      good
chromium@471670      2336.41 +- 126.537      6       bad       <--
chromium@471671      2246.58 +- 1552.45      14      bad
chromium@471672      2115.02 +- 2317.51      21      bad
chromium@471677      2271.34 +- 654.251      14      bad
chromium@471700      2330.19 +- 223.838      9       bad

To Run This Test
  src/tools/perf/run_benchmark -v --browser=release_x64 --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests --story-filter=Daum loading.desktop

Debug Info
  https://chromeperf.appspot.com/buildbucket_job_status/8979249512460035520

Is this bisect wrong?
  https://chromeperf.appspot.com/bad_bisect?try_job_id=6443129068060672


| 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!

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