All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=768379

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=2aedd2ef4a09804c356a4eb639bab6cae3913471fdb3431a1e552a8bdf7b6791


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

android-nexus6

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8967471882492007600

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

Suspected Commit
  Author : Albert Mingkun Yang
  Commit : c9b08c6579a2a56a2a763318447788e4d1405365
  Date   : Fri Sep 22 12:28:38 2017
  Subject: Use args to avoid unnecessary work in RecordWrite stub

Bisect Details
  Configuration: android_nexus6_perf_bisect
  Benchmark    : media.android.tough_video_cases_tbmv2
  Metric       : memory:chrome:all_processes:reported_by_chrome:v8:effective_size_avg/video.html?src_tulip2.mp4_busyjs
  Change       : 1.64% | 4379944.66667 -> 4451910.66667

Revision                           Result                  N
chromium@503667                    4379945 +- 1239.51      6      good
chromium@503706                    4379277 +- 2197.31      6      good
chromium@503726                    4380305 +- 502.972      6      good
chromium@503736                    4379591 +- 2091.47      6      good
chromium@503741                    4379701 +- 1922.82      6      good
chromium@503743                    4379469 +- 2045.93      6      good
chromium@503744                    4380099 +- 506.554      6      good
chromium@503744,v8@b4ff29d870      4379429 +- 1540.18      6      good
chromium@503744,v8@c9b08c6579      4450855 +- 1892.31      6      bad       <--
chromium@503745                    4451911 +- 551.729      6      bad

To Run This Test
  src/tools/perf/run_benchmark -v --browser=android-chromium --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests --story-filter=video.html.src.tulip2.mp4.busyjs media.android.tough_video_cases_tbmv2

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8967471882492007600


For feedback, file a bug with component Speed>Bisection