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Issue 681570 link

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Issue metadata

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



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45.9% regression in smoothness.top_25_smooth at 443315:443441

Project Member Reported by nzolghadr@chromium.org, Jan 16 2017

Issue description

See the link to graphs below.
 
All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=681570

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgwKv8rgoM


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

chromium-rel-win10
Project Member

Comment 3 by 42576172...@developer.gserviceaccount.com, Jan 16 2017

Cc: reed@google.com
Owner: reed@google.com

=== Auto-CCing suspected CL author reed@google.com ===

Hi reed@google.com, 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 : reed
  Commit : ae7d8e56c8cc244b4ca0ae692b76e662c2563329
  Date   : Thu Jan 12 21:28:46 2017
  Subject: use SkRasterHandleAllocator to support GDI drawing in SkCanvas

Bisect Details
  Configuration: winx64_10_perf_bisect
  Benchmark    : smoothness.top_25_smooth
  Metric       : mean_input_event_latency/Wikipedia (1 tab)
  Change       : 39.95% | 3.95816666667 -> 5.53933333333

Revision             Result                   N
chromium@443315      3.95817 +- 0.272622      6      good
chromium@443347      3.88067 +- 0.207252      6      good
chromium@443363      3.97933 +- 0.221457      6      good
chromium@443364      3.969 +- 0.360366        6      good
chromium@443365      5.49833 +- 0.241722      6      bad       <--
chromium@443367      5.4615 +- 0.239607       6      bad
chromium@443371      5.62417 +- 0.318727      6      bad
chromium@443378      5.567 +- 0.187585        6      bad
chromium@443441      5.53933 +- 0.420073      6      bad

To Run This Test
  src/tools/perf/run_benchmark -v --browser=release_x64 --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests --story-filter=Wikipedia..1.tab. smoothness.top_25_smooth

Debug Info
  https://chromeperf.appspot.com/buildbucket_job_status/8990297893803459520

Is this bisect wrong?
  https://chromeperf.appspot.com/bad_bisect?try_job_id=5876603164295168


| 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!
Status: Assigned (was: Untriaged)
This bug has an owner, but was in a state that our triage picked up. Marking as Assigned.
Status: WontFix (was: Assigned)
Doesn't look like we'll make much progress on this after 8 months.

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