All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=628261

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgiouLqAoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgiobaoQoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgirKSrgoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgyuCsvwoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgioH1ugoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgyuChsAoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgiovvuQoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgioGrpwoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgiufPuwoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgirL2vwoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgipfYpgoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgivOSowsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgsuu69QoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgiqzc_goM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgipCC_wkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgyuCsvwkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgiuKRpwsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgip2kvwoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgirqrrAsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgiobBsAoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgyuDLuAoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgivCjrAoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgirrfvQkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgisDBtgkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgip2usAoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICg8vXbpgkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgionurgsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgip3ZqQoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgivnFtgoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgivPpqwsM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgyuCfpQoM


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

chromium-rel-mac-hdd

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/9007146266269698272

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/9004252611884533616

===== 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@405184  1544470  4065.64  5  good
chromium@405199  1543552  5158.64  5  good
chromium@405207  1546984  1665.08  5  good
chromium@405211  1545768  1359.53  5  good
chromium@405212  3346672  0.0      5  bad    <--
chromium@405213  3347569  2005.31  5  bad
chromium@405214  3346672  0.0      5  bad
chromium@405244  3347569  2005.31  5  bad

Bisect job ran on: mac_hdd_perf_bisect
Bug ID: 628261

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:skia:effective_size_avg/load_news_qq
Relative Change: 116.75%
Score: 99.9

Buildbot stdio: http://build.chromium.org/p/tryserver.chromium.perf/builders/mac_hdd_perf_bisect/builds/732
Job details: https://chromeperf.appspot.com/buildbucket_job_status/9004252611884533616


Not what you expected? We'll investigate and get back to you!
  https://chromeperf.appspot.com/bad_bisect?try_job_id=5827814847152128

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