All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=755647

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=05b36c006acf205d3cde35d447c0c22f33cf08accf7eaaf2d7df9d47894a8a23


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

android-nexus5X
android-nexus7v2
android-webview-nexus6
chromium-rel-mac12

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8971169807470854480

restructuring bug.

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

Suspected Commit
  Author : Khushal
  Commit : 1b8abc019a5b476d503bff7405120c44036799eb
  Date   : Thu Aug 10 05:16:17 2017
  Subject: cc/blink: Replace SkImageGenerator with PaintImageGenerator.

Bisect Details
  Configuration: mac_10_12_perf_bisect
  Benchmark    : system_health.memory_desktop
  Metric       : memory:chrome:all_processes:reported_by_chrome:skia:effective_size_avg/load_games/load_games_bubbles
  Change       : 624.49% | 18339560.0 -> 132868616.0

Revision             Result                    N
chromium@493190      18339560 +- 0.0           6      good
chromium@493225      18339560 +- 0.0           6      good
chromium@493243      18339560 +- 0.0           6      good
chromium@493248      18339560 +- 0.0           6      good
chromium@493250      18339560 +- 0.0           6      good
chromium@493251      132868616 +- 2271934      6      bad       <--
chromium@493252      134386616 +- 3617812      6      bad
chromium@493260      133071016 +- 4907939      6      bad
chromium@493330      132868616 +- 4461991      6      bad

Please refer to the following doc on diagnosing memory regressions:
  https://chromium.googlesource.com/chromium/src/+/master/docs/memory-infra/memory_benchmarks.md

To Run This Test
  src/tools/perf/run_benchmark -v --browser=release --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests --story-filter=load.games.bubbles system_health.memory_desktop

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8971169807470854480


For feedback, file a bug with component Speed>Bisection