All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=763484

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=144f40a0d968e4ad3c2d8679a800f8c36022a4b1c80e2e68e77c27f1be9813e6


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

chromium-rel-mac11-pro

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8968992708687924368

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

Suspected Commit
  Author : Eric Karl
  Commit : 6a0f206ccbe0b1e81f53a79f37474a4ba3c760e8
  Date   : Tue Sep 05 20:05:40 2017
  Subject: Use GPU Discardable in Image Decode Cache

Bisect Details
  Configuration: mac_pro_perf_bisect
  Benchmark    : media.tough_video_cases_tbmv2
  Metric       : memory:chrome:renderer_processes:reported_by_chrome:cc:locked_size_avg/memory:chrome:renderer_processes:reported_by_chrome:cc:locked_size_avg

Revision             Result                 N
chromium@499691      0.0 +- 0.0             6      good
chromium@499718      0.0 +- 0.0             6      good
chromium@499722      0.0 +- 0.0             6      good
chromium@499723      0.0 +- 0.0             6      good
chromium@499724      7540.5 +- 0.0          6      bad       <--
chromium@499725      8507.74 +- 2364.8      5      bad
chromium@499731      7540.5 +- 0.0          6      bad
chromium@499744      7540.5 +- 0.0          6      bad
chromium@499797      7540.5 +- 0.0          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/8968992708687924368


For feedback, file a bug with component Speed>Bisection