All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=740447

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=33037d95f30043b6721c80ccf2c8fda0dd4477ac6d3370956e1facfb5fa0bd31


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

android-webview-nexus5X

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8974476217910207968

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

Suspected Commit
  Author : Yutaka Hirano
  Commit : 84047549ac37bab70d7306566c912e59131f3e1f
  Date   : Mon Jun 19 04:16:15 2017
  Subject: [Loading] Save one post-task when the data pipe is ready on arrival

Bisect Details
  Configuration: android_webview_arm64_aosp_perf_bisect
  Benchmark    : system_health.memory_mobile
  Metric       : memory:webview:all_processes:reported_by_chrome:cc:effective_size_avg/load_social/load_social_pinterest
  Change       : 21.72% | 38008489.1429 -> 29752763.4286

Revision             Result                    N
chromium@480341      38008489 +- 12375092      14      good
chromium@480342      28223925 +- 11723308      6       bad       <--
chromium@480343      29752763 +- 21707348      14      bad
chromium@480345      28937383 +- 16017087      9       bad
chromium@480349      30364299 +- 27742409      21      bad
chromium@480357      29752763 +- 21707348      14      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=android-webview --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests --story-filter=load.social.pinterest system_health.memory_mobile

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

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8974476217910207968


For feedback, file a bug with component Speed>Bisection