All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=766573

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=18b8481c6e691eee436a9d2ccb185ac83f3081715399cd168e4202f88c0cd81e


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

android-nexus5X
android-nexus6
android-nexus7v2
android-one
android-webview-nexus5X
android-webview-nexus6
chromium-rel-win10
chromium-rel-win7-gpu-intel
chromium-rel-win7-x64-dual
chromium-rel-win8-dual

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8968030460744243760

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

Suspected Commit
  Author : Mike Klein
  Commit : 7a620575b0512b33708e723c260fe66b90b5b103
  Date   : Sat Sep 16 02:20:04 2017
  Subject: Revert "Reland "zlib: inflate using wider loads and stores""

Bisect Details
  Configuration: android_nexus7_perf_bisect
  Benchmark    : blink_perf.image_decoder
  Metric       : decode-png/decode-png
  Change       : 13.81% | 296.793 -> 337.791541667

Revision             Result                  N
chromium@502412      296.793 +- 12.0129      6      good
chromium@502444      293.236 +- 4.79343      6      good
chromium@502460      291.612 +- 12.1512      6      good
chromium@502468      293.957 +- 8.12234      6      good
chromium@502472      293.487 +- 13.4866      6      good
chromium@502473      294.386 +- 7.97232      6      good
chromium@502474      335.724 +- 8.12346      6      bad       <--
chromium@502476      337.792 +- 20.908       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 blink_perf.image_decoder

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8968030460744243760


For feedback, file a bug with component Speed>Bisection