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Issue metadata

Status: Duplicate
Merged: issue 609771
Owner:
Last visit > 30 days ago
Closed: May 2016
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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2.4%-42.3% regression in webrtc.peerconnection at 391628:391673

Project Member Reported by alexclarke@chromium.org, May 9 2016

Issue description

See the link to graphs below.
 
All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=610251

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICg1I-EpAoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICg1PPqrQoM


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

android-nexus6
android-one
Mergedinto: 609771
Status: Duplicate (was: Assigned)

===== BISECT JOB RESULTS =====
Status: completed


===== SUSPECTED CL(s) =====
Subject : cc: Move prepaint region calculations to the tiling set.
Author  : vmpstr
Commit description:
  
This patch moves prepaint region calculations from the tiling to the
tiling set. This ensures that new tilings get proper skewport
information. It also allows us to retrieve prepaint regions
independently of tilings present, which is useful for iterating images.

R=enne, danakj
CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel

Review-Url: https://codereview.chromium.org/1939963002
Cr-Commit-Position: refs/heads/master@{#391645}
Commit  : cf1113301b3c251c09ac7f7576b4f98bebf64f25
Date    : Wed May 04 21:23:29 2016


===== TESTED REVISIONS =====
Revision         Mean     Std Dev  N   Good?
chromium@391636  42443.7  206.226  12  good
chromium@391641  42472.8  120.246  5   good
chromium@391643  42424.5  258.545  8   good
chromium@391644  42486.5  97.8147  8   good
chromium@391645  42828.8  118.301  5   bad    <--
chromium@391654  42776.3  215.349  12  bad
chromium@391671  42678.0  245.126  8   bad

Bisect job ran on: android_nexus6_perf_bisect
Bug ID: 610251

Test Command: src/tools/perf/run_benchmark -v --browser=android-chromium --output-format=chartjson --upload-results --also-run-disabled-tests webrtc.peerconnection
Test Metric: vm_private_dirty_final_renderer/vm_private_dirty_final_renderer
Relative Change: 0.42%
Score: 99.5

Buildbot stdio: http://build.chromium.org/p/tryserver.chromium.perf/builders/android_nexus6_perf_bisect/builds/2170
Job details: https://chromeperf.appspot.com/buildbucket_job_status/9013151164166932272


Not what you expected? We'll investigate and get back to you!
  https://chromeperf.appspot.com/bad_bisect?try_job_id=5910830470660096

| 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 Tests>AutoBisect.  Thank you!

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