All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=628637

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgiouw9gkM


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

chromium-rel-mac11

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/9007060487332802336

===== 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@405051  4609365  215252   12  good
chromium@405095  4631211  211593   12  bad

Bisect job ran on: mac_10_11_perf_bisect
Bug ID: 628637

Test Command: src/tools/perf/run_benchmark -v --browser=release --output-format=chartjson --upload-results --also-run-disabled-tests system_health.memory_desktop
Test Metric: load_news-memory:chrome:all_processes:reported_by_chrome:blink_gc:effective_size_avg/load_news_qq
Relative Change: 2.23%
Score: 0

Buildbot stdio: http://build.chromium.org/p/tryserver.chromium.perf/builders/mac_10_11_perf_bisect/builds/742
Job details: https://chromeperf.appspot.com/buildbucket_job_status/9007060487332802336


Not what you expected? We'll investigate and get back to you!
  https://chromeperf.appspot.com/bad_bisect?try_job_id=5841505181237248

| 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/9006791405258185056

Another one: https://build.chromium.org/p/tryserver.chromium.perf/builders/mac_retina_perf_bisect/builds/1425

===== 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@405053  259233  1184.2   12  good
chromium@405180  243578  60833.5  12  bad

Bisect job ran on: mac_retina_perf_bisect
Bug ID: 628637

Test Command: src/tools/perf/run_benchmark -v --browser=release --output-format=chartjson --upload-results --also-run-disabled-tests system_health.memory_desktop
Test Metric: load_social-memory:chrome:all_processes:reported_by_chrome:dom_storage:effective_size_avg/load_social_facebook
Relative Change: 1.27%
Score: 0

Buildbot stdio: http://build.chromium.org/p/tryserver.chromium.perf/builders/mac_retina_perf_bisect/builds/1425
Job details: https://chromeperf.appspot.com/buildbucket_job_status/9006791405258185056


Not what you expected? We'll investigate and get back to you!
  https://chromeperf.appspot.com/bad_bisect?try_job_id=5841359353675776

| 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/9006717625693717568

Wider bisect: https://build.chromium.org/p/tryserver.chromium.perf/builders/mac_10_11_perf_bisect/builds/748

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/9005150814945070480

===== 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@405051  4456448  0.0      5  good
chromium@405136  4535091  175852   5  good
chromium@405178  4613734  215373   5  good
chromium@405199  4613734  215373   5  good
chromium@405210  4797235  71791.1  5  good
chromium@405211  4561306  215373   5  good
chromium@405212  4915264  0.0      5  bad    <--
chromium@405213  4915264  0.0      5  bad
chromium@405215  4915264  0.0      5  bad
chromium@405220  4915264  0.0      5  bad

Bisect job ran on: mac_10_11_perf_bisect
Bug ID: 628637

Test Command: src/tools/perf/run_benchmark -v --browser=release --output-format=chartjson --upload-results --also-run-disabled-tests system_health.memory_desktop
Test Metric: load_news-memory:chrome:all_processes:reported_by_chrome:blink_gc:effective_size_avg/load_news_qq
Relative Change: 10.30%
Score: 95.0

Buildbot stdio: http://build.chromium.org/p/tryserver.chromium.perf/builders/mac_10_11_perf_bisect/builds/816
Job details: https://chromeperf.appspot.com/buildbucket_job_status/9005150814945070480


Not what you expected? We'll investigate and get back to you!
  https://chromeperf.appspot.com/bad_bisect?try_job_id=5785438032232448

| 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!