All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=740445

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=9f1cad672d67b7986d0a1fc0a81312171032eec6748c750096cefcbe1668a46a


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

android-nexus6

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8974476276927043776

=== 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_nexus6_perf_bisect
  Benchmark    : system_health.memory_mobile
  Metric       : memory:chrome:all_processes:reported_by_chrome:cc:effective_size_avg/load_social/load_social_pinterest
  Change       : 11.99% | 56093031.619 -> 49366152.381

Revision             Result                    N
chromium@480312      56093032 +- 25065455      21      good
chromium@480329      57723790 +- 12107765      9       good
chromium@480338      56398799 +- 19716653      14      good
chromium@480340      57723790 +- 12107765      9       good
chromium@480341      56398799 +- 19716653      14      good
chromium@480342      49977687 +- 26585929      21      bad       <--
chromium@480346      48066994 +- 38781435      21      bad
chromium@480379      49366152 +- 25065455      21      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-chromium --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/8974476276927043776


For feedback, file a bug with component Speed>Bisection