All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=771319

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=1924d5e951dfb40d6b1d41e64e6cfd1bb39817f6160975db69c4719532320d76


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

chromium-rel-win10
chromium-rel-win7-gpu-nvidia

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8966724956042316944

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

Suspected Commit
  Author : Benedikt Meurer
  Commit : 08db4d7652967c1ed12450a73ff53f5d6bbf1fdf
  Date   : Mon Oct 02 12:35:05 2017
  Subject: [ic] Properly handle polymorphic symbol accesses.

Bisect Details
  Configuration: winx64_10_perf_bisect
  Benchmark    : speedometer
  Metric       : Total/Total
  Change       : 5.12% | 3033.819 -> 3189.02516667

Revision                           Result                  N
chromium@505694                    3033.82 +- 63.199       6      good
chromium@505729                    3026.96 +- 13.2498      6      good
chromium@505731                    3010.57 +- 52.7563      6      good
chromium@505731,v8@08db4d7652      3178.58 +- 61.7963      6      bad       <--
chromium@505731,v8@17d86d76fb      3186.02 +- 19.4741      6      bad
chromium@505731,v8@1fa0f9ba4c      3181.3 +- 63.1941       6      bad
chromium@505732                    3191.59 +- 52.4226      6      bad
chromium@505734                    3163.3 +- 22.2038       6      bad
chromium@505739                    3186.93 +- 49.522       6      bad
chromium@505747                    3171.46 +- 24.1667      6      bad
chromium@505764                    3189.03 +- 29.4512      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 speedometer

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8966724956042316944


For feedback, file a bug with component Speed>Bisection