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Issue 760169 link

Starred by 1 user

Issue metadata

Status: WontFix
Owner:
Closed: Jan 2018
Cc:
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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12.7% regression in blink_perf.bindings at 496065:496371

Project Member Reported by pmeenan@chromium.org, Aug 29 2017

Issue description

See the link to graphs below.
 
Project Member

Comment 1 by 42576172...@developer.gserviceaccount.com, Aug 29 2017

All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=760169

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=b055bc406ccff799e4cf6285b84bedd9eeb50f109dd1c549364db603eeac311f


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

chromium-rel-mac11-air
Project Member

Comment 3 by 42576172...@developer.gserviceaccount.com, Aug 30 2017

Cc: peria@chromium.org
Owner: peria@chromium.org
Status: Assigned (was: Untriaged)

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

Hi peria@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 : Hitoshi Yoshida
  Commit : f2f50dec16d633a28d799ee5c3223159444e9e46
  Date   : Tue Aug 22 13:23:55 2017
  Subject: (Reland)[Bindings] Create and use V8 context snapshots.

Bisect Details
  Configuration: mac_air_perf_bisect
  Benchmark    : blink_perf.bindings
  Metric       : get-attribute/get-attribute
  Change       : 8.50% | 187.17858743 -> 171.262181551

Revision             Result                  N
chromium@496064      187.179 +- 5.27435      6       good
chromium@496218      183.551 +- 8.0631       6       good
chromium@496257      182.204 +- 7.01261      9       good
chromium@496276      180.415 +- 9.43563      9       good
chromium@496286      177.144 +- 60.8024      14      good
chromium@496289      181.256 +- 5.61951      6       good
chromium@496290      163.189 +- 14.8035      6       bad       <--
chromium@496291      172.208 +- 35.7435      21      bad
chromium@496295      169.244 +- 29.0903      14      bad
chromium@496371      171.262 +- 5.96006      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 blink_perf.bindings

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8969912256786316176


For feedback, file a bug with component Speed>Bisection
Cc: jbroman@chromium.org
peria: ping on this performance regression? cc-ing jbroman, owner of blink_perf.bindings, to comment on severity.
Status: WontFix (was: Assigned)
Doesn't look like we'll get much further on this regression from August.

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