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Issue 771303 link

Starred by 1 user
Status: WontFix
Owner:
brucedaw...@chromium.org
Closed: Oct 2017
Cc:
brucedaw...@chromium.org
cblume@chromium.org
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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1.3%-1.6% regression in blink_perf.image_decoder at 503870:503935

Project Member Reported by majidvp@chromium.org, Oct 3 2017 
There is also a regression in smoothness.gpu_rasterization.tough_filter_cases which may turn out to be unrelated but grouping it for now.
Project Member

Comment 1 by 42576172...@developer.gserviceaccount.com, Oct 3 2017 

All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=771303

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=6f959f6b1e3fdb14ecc6d88ab840d610b73caee0f01c045681cdf37ddd2537af


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

chromium-rel-win7-dual
win-high-dpi
Project Member

Comment 3 by 42576172...@developer.gserviceaccount.com, Oct 4 2017

Cc: brucedaw...@chromium.org
Owner: brucedaw...@chromium.org
Status: Assigned (was: Untriaged)

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

Hi brucedawson@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 : Bruce Dawson
  Commit : d7af1e3aba05d9839ecffa52585b6e4808212142
  Date   : Sat Sep 23 00:35:11 2017
  Subject: Make VS 2017 the default compiler on Windows

Bisect Details
  Configuration: win_perf_bisect
  Benchmark    : smoothness.gpu_rasterization.tough_filters_cases
  Metric       : frame_times/Filter Terrain SVG
  Change       : 1.28% | 37.5611279308 -> 37.9868462714

Revision             Result                   N
chromium@503869      37.5611 +- 1.21762       14      good
chromium@503903      37.3012 +- 1.4174        9       good
chromium@503911      37.4091 +- 0.69139       6       good
chromium@503913      37.5165 +- 0.872841      9       good
chromium@503914      37.2761 +- 1.18494       9       good
chromium@503915      38.0255 +- 0.718757      9       bad       <--
chromium@503919      37.9989 +- 1.69811       14      bad
chromium@503935      37.9868 +- 1.12911       14      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 --story-filter=Filter.Terrain.SVG smoothness.gpu_rasterization.tough_filters_cases

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8966726441373549312


For feedback, file a bug with component Speed>Bisection

Comment 4 by brucedaw...@chromium.org, Oct 4 2017 

See https://bugs.chromium.org/p/chromium/issues/detail?id=771307#c4

I propose closing this as WontFix.

Comment 5 by cblume@chromium.org, Oct 4 2017

Status: WontFix (was: Assigned)
Agreed.
Thank you for pushing on the new compiler. :)
►

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