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Issue metadata

Status: Duplicate
Merged: issue 731657
Owner: ----
Closed: Jun 2017
Cc:
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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10.5%-26.7% regression in blink_perf.css at 477288:477510

Project Member Reported by primiano@chromium.org, Jun 9 2017

Issue description

See the link to graphs below.
 
Mergedinto: 731657
Status: Duplicate (was: Untriaged)

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

Suspected Commit
  Author : Fernando Serboncini
  Commit : 2e48d743c9c647a66409c98ba96cbe80fd70774b
  Date   : Tue Jun 06 19:49:57 2017
  Subject: Remove CSSTextCache from CSSPrimitiveValue

Bisect Details
  Configuration: android_nexus7_perf_bisect
  Benchmark    : blink_perf.css
  Metric       : CSSPropertySetterGetter/CSSPropertySetterGetter
  Change       : 5.55% | 375.085022385 -> 354.276621759

Revision             Result                  N
chromium@477371      375.085 +- 7.7719       6      good
chromium@477376      368.327 +- 7.1062       6      good
chromium@477378      364.723 +- 13.5513      6      good
chromium@477379      368.376 +- 8.8104       6      good
chromium@477380      350.544 +- 8.63941      6      bad       <--
chromium@477389      349.952 +- 10.7031      6      bad
chromium@477406      346.245 +- 5.28174      6      bad
chromium@477441      341.947 +- 7.22307      6      bad
chromium@477510      354.277 +- 10.6359      6      bad

To Run This Test
  src/tools/perf/run_benchmark -v --browser=android-chromium --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests blink_perf.css

Debug Info
  https://chromeperf.appspot.com/buildbucket_job_status/8977268074330686000

Is this bisect wrong?
  https://chromeperf.appspot.com/bad_bisect?try_job_id=6722760958541824


| 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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