All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=628294

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgivj8vAkM


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

win-zenbook

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/9007143197056034560

===== BISECT JOB RESULTS =====
Status: completed


=== Bisection aborted ===
The bisect was aborted because The metric values for the initial "good" and "bad" revisions do not represent a clear regression.
Please contact the the team (see below) if you believe this is in error.

=== Warnings ===
The following warnings were raised by the bisect job:

 * Bisect failed to reproduce the regression with enough confidence.

===== TESTED REVISIONS =====
Revision         Mean     Std Dev  N   Good?
chromium@405109  5555397  462264   12  good
chromium@405124  5619764  483898   8   bad

Bisect job ran on: winx64_zen_perf_bisect
Bug ID: 628294

Test Command: src/tools/perf/run_benchmark -v --browser=release_x64 --output-format=chartjson --upload-results --also-run-disabled-tests system_health.memory_desktop
Test Metric: load_social-memory:chrome:all_processes:reported_by_chrome:partition_alloc:effective_size_avg/load_social_vk
Relative Change: 0.15%
Score: 0

Buildbot stdio: http://build.chromium.org/p/tryserver.chromium.perf/builders/winx64_zen_perf_bisect/builds/267
Job details: https://chromeperf.appspot.com/buildbucket_job_status/9007143197056034560


Not what you expected? We'll investigate and get back to you!
  https://chromeperf.appspot.com/bad_bisect?try_job_id=5890802144772096

| O O | Visit http://www.chromium.org/developers/speed-infra/perf-bug-faq
|  X  | for more information addressing perf regression bugs. For feedback,
| / \ | file a bug with component Tests>AutoBisect.  Thank you!

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/9007065475159476400

Widened the bisect range: https://build.chromium.org/p/tryserver.chromium.perf/builders/winx64_zen_perf_bisect/builds/270

===== BISECT JOB RESULTS =====
Status: completed


===== SUSPECTED CL(s) =====
Subject : Add benchmark that imitates news reading.
Author  : ulan
Commit description:
  
Each story in the benchmark does the following:
1. Load the main page.
2. Open and scroll the first news item.
3. Go back to the main page and scroll it.
4. Open and scroll the second news item.
5. Go back to the main page and scroll it.
6. etc.

This workflow is interesting because it is close to real world
and generates a lot of garbage by creating and discarding pages.

A couple of websites crash with OOM on svelte device, so by
tracking and optimizing for this benchmark we can improve
user experience on low-memory devices.

*** NOTE TO SHERRIF ***
Regressions are expected in system_health.memory_mobile and
system_health.memory_desktop for the following stories:
- load:news:cnn
- load:social:facebook
- load:news:qq
- load:news:reddit
- load:social:twitter

If there are failing tests in form of benchmarks.system_health_smoke_test.SystemHealthBenchmarkSmokeTest.*
please do not revert this CL but instead disabling failing
test by adding them into the _DISABLE_TESTS list in
tools/perf/benchmarks/system_health_smoke_test.py

BUG=589726
CQ_INCLUDE_TRYBOTS=tryserver.chromium.perf:android_s5_perf_cq;tryserver.chromium.perf:mac_retina_perf_cq

Review-Url: https://codereview.chromium.org/2118293002
Cr-Commit-Position: refs/heads/master@{#405212}
Commit  : 5b1847df818e5be4592e9a6ac4832350bb663023
Date    : Wed Jul 13 17:39:28 2016


===== TESTED REVISIONS =====
Revision         Mean     Std Dev  N  Good?
chromium@404911  5979758  25470.8  5  good
chromium@405071  5644079  476924   5  good
chromium@405150  5961349  22161.9  5  good
chromium@405182  5954795  27741.8  5  good
chromium@405202  5872725  237125   5  good
chromium@405211  5838128  241962   5  good
chromium@405212  6161128  66456.2  5  bad    <--
chromium@405213  6162164  39641.4  5  bad
chromium@405215  6150478  64507.9  5  bad
chromium@405220  6194202  52277.6  5  bad

Bisect job ran on: winx64_zen_perf_bisect
Bug ID: 628294

Test Command: src/tools/perf/run_benchmark -v --browser=release_x64 --output-format=chartjson --upload-results --also-run-disabled-tests system_health.memory_desktop
Test Metric: load_social-memory:chrome:all_processes:reported_by_chrome:partition_alloc:effective_size_avg/load_social_vk
Relative Change: 3.59%
Score: 95.0

Buildbot stdio: http://build.chromium.org/p/tryserver.chromium.perf/builders/winx64_zen_perf_bisect/builds/270
Job details: https://chromeperf.appspot.com/buildbucket_job_status/9007065475159476400


Not what you expected? We'll investigate and get back to you!
  https://chromeperf.appspot.com/bad_bisect?try_job_id=6738412279693312

| O O | Visit http://www.chromium.org/developers/speed-infra/perf-bug-faq
|  X  | for more information addressing perf regression bugs. For feedback,
| / \ | file a bug with component Tests>AutoBisect.  Thank you!