All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=758330

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=0e69aaf723fc911e037a67df380e325fadc432a1154513e2788d07ea0c6ee4d7


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

chromium-rel-mac11-air

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8970443773872552560

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

Suspected Commit
  Author : Siddhartha
  Commit : e241d0ac5772386e8b7e8016c99c0ac5d07e8dcb
  Date   : Fri Aug 18 23:11:02 2017
  Subject: Memory-infra: Remove use of unique tracing ID and add resident size to discardable dumps

Bisect Details
  Configuration: mac_air_perf_bisect
  Benchmark    : media.tough_video_cases_tbmv2
  Metric       : memory:chrome:renderer_processes:reported_by_chrome:discardable:effective_size_avg/memory:chrome:renderer_processes:reported_by_chrome:discardable:effective_size_avg

Revision             Result                  N
chromium@495499      0.0 +- 0.0              6      good
chromium@495641      0.0 +- 0.0              6      good
chromium@495712      0.0 +- 0.0              5      good
chromium@495730      0.0 +- 0.0              6      good
chromium@495731      0.0 +- 0.0              6      good
chromium@495732      10638.2 +- 2360.72      6      bad       <--
chromium@495733      10325.3 +- 2684.95      6      bad
chromium@495735      9830.4 +- 2572.49       5      bad
chromium@495739      11036.4 +- 3306.41      6      bad
chromium@495747      10382.2 +- 3132.25      6      bad
chromium@495782      10496.0 +- 2883.71      6      bad
chromium@496064      10780.4 +- 850.484      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 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/8970443773872552560


For feedback, file a bug with component Speed>Bisection