All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=764615

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=52dd3ab9f8d577f851d5fec0e4b72a8fbc918bd0a10fcfbf46d29ed4583020eb


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

chromium-rel-mac11

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8968587994940250464

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

Bisect Details
  Configuration: mac_10_11_perf_bisect
  Benchmark    : v8.browsing_desktop
  Metric       : v8-gc-incremental-finalize_avg/browse_search/browse_search_google

Revision             Result                     N
chromium@500844      0.143263 +- 0.0252498      21      good
chromium@500879      0.142463 +- 0.0372206      21      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=browse.search.google v8.browsing_desktop

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8968587994940250464


For feedback, file a bug with component Speed>Bisection

No bisect so far on the bots, but only 2 possible culprits in the range:

https://chromium.googlesource.com/v8/v8/+log/2431ff3267098a3efdb3df191bd1cb97b3231670..76fec356daae9a729443f0952ee189eb287a957c

f31bae0 [builtins] Add fast-path for JSTypedArray to CreateListFromArrayLike. by Benedikt Meurer · 4 days ago
5100a00 [turbofan] Reland^3 "Polymorphic inlining - try merge map check dispatch with function call dispatch." by Jaroslav Sevcik · 4 days ago

+bmeurer,jarin any idea?

Starting another bisect.

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8968399180299725472

=== BISECT JOB RESULTS ===
Perf regression found with culprit

Suspected Commit
  Author : Hitoshi Yoshida
  Commit : 3e5db563a65e3968d1e336312ae1bbb85e18321d
  Date   : Mon Sep 11 02:31:08 2017
  Subject: FieldTrial: Add field trial configuration for V8ContextSnapshot

Bisect Details
  Configuration: mac_10_11_perf_bisect
  Benchmark    : v8.browsing_desktop
  Metric       : v8-gc-incremental-finalize_avg/browse_search/browse_search_google
  Change       : 14.70% | 0.121348577893 -> 0.139186576169

Revision             Result                      N
chromium@500818      0.121349 +- 0.00774032      6      good
chromium@500826      0.119254 +- 0.00956234      6      good
chromium@500828      0.116868 +- 0.00896169      6      good
chromium@500829      0.14875 +- 0.012783         6      bad       <--
chromium@500830      0.152306 +- 0.00939816      6      bad
chromium@500834      0.143737 +- 0.0154086       6      bad
chromium@500849      0.143967 +- 0.0192981       6      bad
chromium@500879      0.139187 +- 0.0169111       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 --story-filter=browse.search.google v8.browsing_desktop

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8968399180299725472


For feedback, file a bug with component Speed>Bisection