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Issue 782217 link

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Issue metadata

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



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2.4%-328.6% regression in v8.browsing_desktop at 513730:513955

Project Member Reported by mvstanton@google.com, Nov 7 2017

Issue description

Wow, the only relevant V8 CL seems to be the turbofan OOB KeyedLoadIC support. Hmm. Will bisect.
 
All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=782217

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=b0bc7b658eeec5765ede3724e59c520926d2cad8bb86183fcda9490bf25fd98d


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

android-nexus5X
android-webview-nexus5X
android-webview-nexus6
chromium-rel-mac-retina
chromium-rel-mac11
chromium-rel-mac11-air
chromium-rel-mac11-pro
chromium-rel-mac12
chromium-rel-mac12-mini-8gb
chromium-rel-win7-dual
chromium-rel-win7-gpu-ati
chromium-rel-win7-x64-dual
chromium-rel-win8-dual
Cc: -mvstanton@google.com bmeu...@chromium.org
Possibly relevant CL. https://chromium.googlesource.com/v8/v8/+/b7168573ed011113746873fd92b71e8bcc9dddb1

=== BISECT JOB RESULTS ===
NO Perf regression found

Bisect Details
  Configuration: android_webview_arm64_aosp_perf_bisect
  Benchmark    : v8.runtimestats.browsing_mobile
  Metric       : v8-gc-incremental-step_sum/browse_news/browse_news_cricbuzz

Revision             Result                  N
chromium@513738      248.146 +- 208.184      21      good
chromium@513765      247.919 +- 239.661      21      bad

To Run This Test
  src/tools/perf/run_benchmark -v --browser=android-webview --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests --story-filter=browse.news.cricbuzz v8.runtimestats.browsing_mobile

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8963581674751093440


For feedback, file a bug with component Speed>Bisection
Status: WontFix (was: Assigned)
These recovered.

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