All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=740442

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=b958044c1df8a6e1ce0261a818012037745ac344a658cbae25818e6b3a1e07fa


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

android-nexus6

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8974476343330907568

=== 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_os:gpu_memory:proportional_resident_size_avg/background_search/background_search_google
  Change       : 22.22% | 75119820.8 -> 58429440.0

Revision             Result                   N
chromium@480312      75119821 +- 1308701      5      good
chromium@480329      74824363 +- 2322679      6      good
chromium@480338      75537067 +- 517287       6      good
chromium@480340      75031893 +- 2275981      6      good
chromium@480341      74898091 +- 2191223      6      good
chromium@480342      58175488 +- 1882093      6      bad       <--
chromium@480346      58574165 +- 3140917      6      bad
chromium@480379      58429440 +- 1755880      6      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=background.search.google 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/8974476343330907568


For feedback, file a bug with component Speed>Bisection