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Issue metadata

Status: Duplicate
Merged: issue 728703
Owner: ----
Closed: Jun 2017
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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5%-6.2% regression in v8.runtimestats.browsing_desktop at 475332:475361

Project Member Reported by mythria@chromium.org, Jun 15 2017

Issue description

See the link to graphs below.
 
All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=733575

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDghtG76AgM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgxtatvgkM


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

chromium-rel-win7-dual
Cc: tebbi@chromium.org
Project Member

Comment 4 by 42576172...@developer.gserviceaccount.com, Jun 15 2017

Mergedinto: 728703
Status: Duplicate (was: Untriaged)

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

Suspected Commit
  Author : thakis
  Commit : 5ea5799ced8c179ee57cf877d370e763e76d819c
  Date   : Mon May 29 15:14:30 2017
  Subject: Revert of Changing default Windows compiler to VS2017 (patchset #1 id:1 of https://codereview.chromium.org/2877993002/ )

Bisect Details
  Configuration: win_perf_bisect
  Benchmark    : v8.runtimestats.browsing_desktop
  Metric       : Compile:duration_avg/browse_social/browse_social_twitter
  Change       : 3.88% | 102.568 -> 107.065

Revision             Result                  N
chromium@475331      102.568 +- 9.3403       14      good
chromium@475346      103.313 +- 10.6845      14      good
chromium@475350      103.019 +- 5.79575      6       good
chromium@475352      102.817 +- 4.15104      6       good
chromium@475353      102.082 +- 6.73092      6       good
chromium@475354      108.778 +- 4.17447      6       bad       <--
chromium@475361      107.065 +- 10.8541      14      bad

To Run This Test
  src/tools/perf/run_benchmark -v --browser=release --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests --story-filter=browse.social.twitter v8.runtimestats.browsing_desktop

Debug Info
  https://chromeperf.appspot.com/buildbucket_job_status/8976729827951451728

Is this bisect wrong?
  https://chromeperf.appspot.com/bad_bisect?try_job_id=4704663267442688


| 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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