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Issue metadata

Status: WontFix
Owner:
Closed: Jul 2017
Cc:
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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19.8%-29.2% regression in v8.runtimestats.browsing_desktop at 481826:481898

Project Member Reported by ulan@google.com, Jun 28 2017

Issue description

See the link to graphs below.
 

Comment 2 by u...@chromium.org, Jun 28 2017

Status: Untriaged (was: Assigned)
Project Member

Comment 3 by 42576172...@developer.gserviceaccount.com, Jun 28 2017

Cc: mlippautz@chromium.org
Owner: mlippautz@chromium.org

=== Auto-CCing suspected CL author mlippautz@chromium.org ===

Hi mlippautz@chromium.org, the bisect results pointed to your CL, please take a look at the
results.


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

Suspected Commit
  Author : Michael Lippautz
  Commit : 14d85ce89c4d2d9d92f2380c0407b41fa0cd178c
  Date   : Fri Jun 23 08:57:09 2017
  Subject: [heap] Switch evacuation to ItemParallelJob

Bisect Details
  Configuration: mac_retina_perf_bisect
  Benchmark    : v8.runtimestats.browsing_desktop
  Metric       : v8-gc-latency-mark-compactor_max/browse_search/browse_search_google
  Change       : 12.98% | 1.79422222222 -> 2.05933333333

Revision                           Result                   N
chromium@481838                    1.79422 +- 0.283379      9      good
chromium@481853                    1.88044 +- 1.0641        9      good
chromium@481861                    1.8665 +- 0.278628       6      good
chromium@481863                    1.798 +- 0.162327        6      good
chromium@481864                    1.88033 +- 0.345858      9      good
chromium@481864,v8@14d85ce89c      2.1185 +- 0.227911       6      bad       <--
chromium@481864,v8@e9e2e13328      2.13567 +- 0.531345      9      bad
chromium@481864,v8@c535258aab      2.12556 +- 0.326668      9      bad
chromium@481865                    2.1305 +- 0.0959766      6      bad
chromium@481868                    2.08922 +- 0.275687      9      bad
chromium@481898                    2.05933 +- 0.176503      6      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.search.google v8.runtimestats.browsing_desktop

Debug Info
  https://chromeperf.appspot.com/buildbucket_job_status/8975552226827930512

Is this bisect wrong?
  https://chromeperf.appspot.com/bad_bisect?try_job_id=5843363368009728


| 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!
Cc: -mlippautz@chromium.org
Status: Assigned (was: Untriaged)
Graphs: https://chromeperf.appspot.com/group_report?bug_id=737508
Status: WontFix (was: Assigned)
Only one web page on one configuration. In general this did not regress; this is WontFix.

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