All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=632641

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICghrzsoQkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICghrftpQoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgxvDzpAoM


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

chromium-rel-mac10
chromium-rel-mac11

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/9005812929574630128

===== 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@408137  65.9171  1.35589  18  good
chromium@408168  65.3551  2.65669  18  bad

Bisect job ran on: mac_10_10_perf_bisect
Bug ID: 632641

Test Command: src/tools/perf/run_benchmark -v --browser=release --output-format=chartjson --upload-results --also-run-disabled-tests smoothness.top_25_smooth
Test Metric: percentage_smooth/http___sports.yahoo.com_
Relative Change: 0.99%
Score: 0

Buildbot stdio: http://build.chromium.org/p/tryserver.chromium.perf/builders/mac_10_10_perf_bisect/builds/2239
Job details: https://chromeperf.appspot.com/buildbucket_job_status/9005812929574630128


Not what you expected? We'll investigate and get back to you!
  https://chromeperf.appspot.com/bad_bisect?try_job_id=5864241119100928

| 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/9005799360217698272

Trying another bisect.

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


===== SUSPECTED CL(s) =====
Subject : Turn on enable begin frame scheduling by default
Author  : enne
Commit description:
  
This turns on --enable-begin-frame-scheduling for all platforms but mus
and Blimp.  This change means browser->renderer begin frame ticks
instead of sending vsync information and having a synthetic source on
the renderer side.  This feature was already on for Android so should
only be a real change for desktop / ChromeOS platforms.

Lots of cleanup can follow from this like removing all commit vsync /
authoritative vsync / CompositorVSyncManager things, but this is a
smaller patch to suss out any performance regressions.

This previously landed and regressed a number of metrics.  Some of these
have been investigated and fixed and the rest are WontFix.

CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel

Review-Url: https://codereview.chromium.org/1939253002
Cr-Commit-Position: refs/heads/master@{#408172}
Commit  : d020d554c9ffc0476d43f5364a47c522b64e3d9a
Date    : Wed Jul 27 17:45:34 2016


===== TESTED REVISIONS =====
Revision         Mean     Std Dev   N  Good?
chromium@408100  74.8267  1.17151   5  good
chromium@408150  75.2533  1.27052   5  good
chromium@408163  75.7604  0.822962  5  good
chromium@408169  75.5348  0.951911  5  good
chromium@408171  75.374   0.987434  5  good
chromium@408172  68.2496  0.930702  5  bad    <--
chromium@408175  66.6667  1.29271   5  bad
chromium@408200  67.7867  1.18359   5  bad

Bisect job ran on: mac_10_11_perf_bisect
Bug ID: 632641

Test Command: src/tools/perf/run_benchmark -v --browser=release --output-format=chartjson --upload-results --also-run-disabled-tests smoothness.top_25_smooth
Test Metric: percentage_smooth/Wikipedia (1 tab)
Relative Change: 9.41%
Score: 99.9

Buildbot stdio: http://build.chromium.org/p/tryserver.chromium.perf/builders/mac_10_11_perf_bisect/builds/776
Job details: https://chromeperf.appspot.com/buildbucket_job_status/9005799360217698272


Not what you expected? We'll investigate and get back to you!
  https://chromeperf.appspot.com/bad_bisect?try_job_id=5232845224673280

| 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!