All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=758532

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=9d6f78560b62a8a62413beb20da55c92abb104b36144092b8d09195e32ac1198


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

win-high-dpi

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8970382646154414176

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

Suspected Commit
  Author : jgruber
  Commit : 1b5df68365045089eb1f1a661a5bc8a2a1323cc6
  Date   : Tue Aug 22 08:20:54 2017
  Subject: [csa] Fix two cases where allocations could go into LO space

Bisect Details
  Configuration: winx64_high_dpi_perf_bisect
  Benchmark    : media.tough_video_cases_tbmv2
  Metric       : memory:chrome:renderer_processes:reported_by_chrome:v8:heap:allocated_objects_size_avg/video.html?src_tulip2.vp9.webm_seek
  Change       : 31.04% | 3039028.0 -> 3982397.33333

Revision                           Result                  N
chromium@496241                    3039028 +- 1533.9       6      good
chromium@496269                    3041187 +- 3370.91      6      good
chromium@496283                    3040509 +- 2039.63      6      good
chromium@496290                    3040237 +- 1896.04      6      good
chromium@496292                    3040245 +- 1914.45      6      good
chromium@496293                    3040537 +- 2303.76      6      good
chromium@496293,v8@9a6f2eec19      3040760 +- 3588.69      6      good
chromium@496293,v8@1b5df68365      3983373 +- 2158.8       6      bad       <--
chromium@496293,v8@748b717763      3982465 +- 1713.92      6      bad
chromium@496294                    3982465 +- 1422.53      6      bad
chromium@496297                    3982397 +- 1659.91      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 --story-filter=video.html.src.tulip2.vp9.webm.seek media.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/8970382646154414176


For feedback, file a bug with component Speed>Bisection