All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=646369

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICg6fO4vQoM


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

chromium-rel-mac-retina

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/9001625855487331104

=== Auto-CCing suspected CL author dtapuska@chromium.org ===

Hi dtapuska@chromium.org, the bisect results pointed to your CL below as possibly
causing a regression. Please have a look at this info and see whether
your CL be related.


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


===== SUSPECTED CL(s) =====
Subject : Enable RAF Aligned Input on waterfall
Author  : dtapuska
Commit description:
  
BUG= 642368 

Review-Url: https://codereview.chromium.org/2324803005
Cr-Commit-Position: refs/heads/master@{#417946}
Commit  : 4d208cf0fb7fcad671dcf97c4c9c95af05f1b666
Date    : Mon Sep 12 15:36:17 2016


===== TESTED REVISIONS =====
Revision         Mean     Std Dev   N  Good?
chromium@417926  11.0357  0.419478  5  good
chromium@417939  10.5712  0.499129  5  good
chromium@417943  10.5212  0.635677  5  good
chromium@417945  10.7471  0.362698  5  good
chromium@417946  12.9765  0.180749  5  bad    <--
chromium@417952  13.3793  0.689013  5  bad

Bisect job ran on: mac_retina_perf_bisect
Bug ID: 646369

Test Command: src/tools/perf/run_benchmark -v --browser=release --output-format=chartjson --upload-results --also-run-disabled-tests scheduler.tough_scheduling_cases
Test Metric: mean_input_event_latency/mean_input_event_latency
Relative Change: 21.24%
Score: 99.8

Buildbot stdio: http://build.chromium.org/p/tryserver.chromium.perf/builders/mac_retina_perf_bisect/builds/1654
Job details: https://chromeperf.appspot.com/buildbucket_job_status/9001625855487331104


Not what you expected? We'll investigate and get back to you!
  https://chromeperf.appspot.com/bad_bisect?try_job_id=5791769793396736

| 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!

dtapuska: Can you take a look at this regression?

Yup we know what is going on. I have started a patch locally to fix it. Just have to get time to complete it. 

perf try bot running with the change is here: https://codereview.chromium.org/2371183002

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/5248d2a4cc2ac706f0404b6c6edf196f5b491539

commit 5248d2a4cc2ac706f0404b6c6edf196f5b491539
Author: dtapuska <dtapuska@chromium.org>
Date: Wed Sep 28 15:52:13 2016

Move synthetic gesture input to be aligned with BeginFrame.

The timing of synthetic events seems almost random. It is best to align
it with something that doesn't fluctuate. Android already rAF aligns its
synthetic input so do this for aura and mac as well.

BUG= 646369 

Review-Url: https://codereview.chromium.org/2372873003
Cr-Commit-Position: refs/heads/master@{#421528}

[modify] https://crrev.com/5248d2a4cc2ac706f0404b6c6edf196f5b491539/content/browser/renderer_host/render_widget_host_view_aura.cc
[modify] https://crrev.com/5248d2a4cc2ac706f0404b6c6edf196f5b491539/content/browser/renderer_host/render_widget_host_view_aura.h
[modify] https://crrev.com/5248d2a4cc2ac706f0404b6c6edf196f5b491539/content/browser/renderer_host/render_widget_host_view_mac.h
[modify] https://crrev.com/5248d2a4cc2ac706f0404b6c6edf196f5b491539/content/browser/renderer_host/render_widget_host_view_mac.mm

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/dfb4211ebbd9934c01cca376edf70fe44daa381f

commit dfb4211ebbd9934c01cca376edf70fe44daa381f
Author: dtapuska <dtapuska@chromium.org>
Date: Mon Oct 03 20:21:35 2016

Revert of Move synthetic gesture input to be aligned with BeginFrame. (patchset #2 id:20001 of https://codereview.chromium.org/2372873003/ )

Reason for revert:
Appears RenderWidgetHostViewChildFrame ends up calling a virtual during the constructor and this isn't getting called. This is an existing bug.

But the change in this CL reveals this bug so reverting this change for now.

Original issue's description:
> Move synthetic gesture input to be aligned with BeginFrame.
>
> The timing of synthetic events seems almost random. It is best to align
> it with something that doesn't fluctuate. Android already rAF aligns its
> synthetic input so do this for aura and mac as well.
>
> BUG= 646369 
>
> Committed: https://crrev.com/5248d2a4cc2ac706f0404b6c6edf196f5b491539
> Cr-Commit-Position: refs/heads/master@{#421528}

TBR=sadrul@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG= 646369 

Review-Url: https://codereview.chromium.org/2390813002
Cr-Commit-Position: refs/heads/master@{#422509}

[modify] https://crrev.com/dfb4211ebbd9934c01cca376edf70fe44daa381f/content/browser/renderer_host/render_widget_host_view_aura.cc
[modify] https://crrev.com/dfb4211ebbd9934c01cca376edf70fe44daa381f/content/browser/renderer_host/render_widget_host_view_aura.h
[modify] https://crrev.com/dfb4211ebbd9934c01cca376edf70fe44daa381f/content/browser/renderer_host/render_widget_host_view_mac.h
[modify] https://crrev.com/dfb4211ebbd9934c01cca376edf70fe44daa381f/content/browser/renderer_host/render_widget_host_view_mac.mm

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/7f7c8cc8b97dd0d5c9159d9e60c62efbc35e6b53

commit 7f7c8cc8b97dd0d5c9159d9e60c62efbc35e6b53
Author: dtapuska <dtapuska@chromium.org>
Date: Tue Oct 11 16:25:38 2016

Move synthetic gesture input to be aligned with BeginFrame.

The timing of synthetic events seems almost random. It is best to align
it with something that doesn't fluctuate. Android already rAF aligns its
synthetic input so do this for aura and mac as well.

Reland https://codereview.chromium.org/2372873003. It was reverted because
of a regression that was fixed in https://codereview.chromium.org/2385333002

BUG= 646369 
TBR=sadrul@chromium.org

Review-Url: https://codereview.chromium.org/2401863003
Cr-Commit-Position: refs/heads/master@{#424449}

[modify] https://crrev.com/7f7c8cc8b97dd0d5c9159d9e60c62efbc35e6b53/content/browser/renderer_host/render_widget_host_view_aura.cc
[modify] https://crrev.com/7f7c8cc8b97dd0d5c9159d9e60c62efbc35e6b53/content/browser/renderer_host/render_widget_host_view_aura.h
[modify] https://crrev.com/7f7c8cc8b97dd0d5c9159d9e60c62efbc35e6b53/content/browser/renderer_host/render_widget_host_view_mac.h
[modify] https://crrev.com/7f7c8cc8b97dd0d5c9159d9e60c62efbc35e6b53/content/browser/renderer_host/render_widget_host_view_mac.mm