All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=776927

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=3ce00bef41f78ae6f4eb718a0163c72c624ce13e1458143f0a9e6efcccfa872a


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

android-one

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8965185802256968096

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

Suspected Commit
  Author : Eric Karl
  Commit : 840b7a60cc3c5f802ca271bd167e888e7494e8aa
  Date   : Wed Oct 18 22:39:08 2017
  Subject: [Re-Land] Use GPU Discardable in Image Decode Cache

Bisect Details
  Configuration: android_one_perf_bisect
  Benchmark    : thread_times.simple_mobile_sites
  Metric       : thread_other_cpu_time_per_frame/http___www.ebay.co.uk_
  Change       : 473.70% | 0.746740285265 -> 4.28405065438

Revision             Result                    N
chromium@509820      0.74674 +- 0.774788       6      good
chromium@509891      0.880758 +- 0.536304      6      good
chromium@509900      0.809609 +- 0.501646      6      good
chromium@509901      0.678079 +- 0.417247      6      good
chromium@509902      3.96206 +- 0.963402       6      bad       <--
chromium@509903      4.08477 +- 0.947404       6      bad
chromium@509905      4.19781 +- 0.753399       6      bad
chromium@509909      4.19144 +- 0.370946       6      bad
chromium@509926      4.08215 +- 0.689025       6      bad
chromium@509961      4.28405 +- 1.109          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 --story-filter=http...www.ebay.co.uk. thread_times.simple_mobile_sites

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8965185802256968096


For feedback, file a bug with component Speed>Bisection