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Issue 759695 link

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Issue metadata

Status: Duplicate
Merged: issue 758230
Owner: ----
Closed: Aug 2017
Cc:
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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51.7% regression in rasterize_and_record_micro.top_25 at 494610:494704

Project Member Reported by kraynov@chromium.org, Aug 28 2017

Issue description

See the link to graphs below.
 
Project Member

Comment 1 by 42576172...@developer.gserviceaccount.com, Aug 28 2017

All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=759695

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=62432b56cdf5d961c0f95fb2997fe7f92c3db9bf591ff7ae7e2f0af2583222b0


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

android-one
Project Member

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

Mergedinto: 758230
Status: Duplicate (was: Untriaged)

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

Suspected Commit
  Author : Xida Chen
  Commit : 177134823106e782420b7ce5150c2aa137014ee2
  Date   : Wed Aug 16 02:35:04 2017
  Subject: Use half-width GPU tiles on low-end android devices

Bisect Details
  Configuration: android_one_perf_bisect
  Benchmark    : rasterize_and_record_micro.top_25
  Metric       : rasterize_time/Wordpress
  Change       : 43.19% | 26.2243333333 -> 37.5515

Revision             Result                   N
chromium@494609      26.2243 +- 0.599478      6      good
chromium@494657      26.6458 +- 1.59823       6      good
chromium@494669      26.9265 +- 2.01325       6      good
chromium@494672      25.5857 +- 8.7768        6      good
chromium@494673      37.3933 +- 3.28225       6      bad       <--
chromium@494674      36.362 +- 1.2156         6      bad
chromium@494675      37.0018 +- 4.30895       6      bad
chromium@494681      37.621 +- 4.3038         6      bad
chromium@494704      37.5515 +- 4.57377       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 --story-filter=Wordpress rasterize_and_record_micro.top_25

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8969999948911100880


For feedback, file a bug with component Speed>Bisection

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