All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=800052

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=4fb2650983ffcad8a7e4188bf0ca397b539abd6e0dee1c7506c63330607743d4


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

android-nexus5
android-nexus6
android-nexus7v2
android-webview-nexus5X
android-webview-nexus6
linux-release

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8957937154386407056

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

Suspected Commit
  Author : George Burgess IV
  Commit : 274d75742451914f74bbad40c405da7f902dd232
  Date   : Wed Jan 03 23:22:46 2018
  Subject: Turn on AFDO for Chromium on Android

Bisect Details
  Configuration: android_webview_nexus6_aosp_perf_bisect
  Benchmark    : blink_perf.image_decoder
  Metric       : decode-lossless-webp/decode-lossless-webp
  Change       : 18.47% | 445.064875 -> 527.281666667

Revision             Result                  N
chromium@526795      445.065 +- 5.34545      6      good
chromium@526833      447.565 +- 5.98024      6      good
chromium@526852      443.495 +- 2.87317      6      good
chromium@526857      445.768 +- 9.90241      6      good
chromium@526858      536.833 +- 7.33696      6      bad       <--
chromium@526859      533.719 +- 4.71724      6      bad
chromium@526861      527.0 +- 8.31739        6      bad
chromium@526870      527.282 +- 4.43021      6      bad

Please refer to the following doc on diagnosing blink_perf regressions:
  https://chromium.googlesource.com/chromium/src/+/master/docs/speed/benchmark_harnesses/blink_perf.md

To Run This Test
  src/tools/perf/run_benchmark -v --browser=android-webview --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/8957937154386407056


For feedback, file a bug with component Speed>Bisection