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Issue 680696 link

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Issue metadata

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



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3.6% regression in smoothness.tough_canvas_cases at 442538:442570

Project Member Reported by benjhayden@chromium.org, Jan 12 2017

Issue description

Tim, do you still want alerts on frame_times or is it deprecated? I see the data has stopped, but I haven't gotten to triaging that data stoppage yet.
 
All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=680696

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgIDgwPnN4AgM


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

chromium-rel-win8-dual
Project Member

Comment 3 by 42576172...@developer.gserviceaccount.com, Jan 13 2017

Cc: bmeu...@chromium.org
Owner: bmeu...@chromium.org

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

Hi bmeurer@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 : bmeurer
  Commit : a3859e48c3c5c1c4f8a0c76b65a389b6063eba89
  Date   : Tue Jan 10 08:33:51 2017
  Subject: [crankshaft] Also inline Math.ceil.

Bisect Details
  Configuration: win_8_perf_bisect
  Benchmark    : smoothness.tough_canvas_cases
  Metric       : frame_times/frame_times
  Change       : 3.62% | 21.9773298683 -> 22.7731052602

Revision                           Result                   N
chromium@442538                    21.9773 +- 0.16744       6      good
chromium@442554                    21.9912 +- 0.147876      6      good
chromium@442563                    21.9846 +- 0.103233      6      good
chromium@442567                    22.0473 +- 0.196573      6      good
chromium@442567,v8@a3859e48c3      23.0308 +- 0.711733      6      bad       <--
chromium@442567,v8@0df234b0ed      22.7437 +- 0.144515      6      bad
chromium@442568                    22.9174 +- 0.37358       6      bad
chromium@442569                    22.7932 +- 0.572594      6      bad
chromium@442570                    22.7731 +- 0.841803      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 smoothness.tough_canvas_cases

Debug Info
  https://chromeperf.appspot.com/buildbucket_job_status/8990636686218191392

Is this bisect wrong?
  https://chromeperf.appspot.com/bad_bisect?try_job_id=5228429114343424


| 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: WontFix (was: Untriaged)
CL was already reverted.

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