All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=634024

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICg5tj-vAoM


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

linux-release

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/9005331429290814400

This is an improvement. :) The bigger the num_runs_in_2_seconds is, the better performance is. We probably need to change the monitoring configuration.

I am working on improving mojo serialization performance recently:
https://bugs.chromium.org/p/chromium/issues/detail?id=624459

And this is the result of that work.

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

Hi yzshen@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 : Mojo C++ bindings: inline struct data view field getters.
Author  : yzshen
Commit description:
  
This significantly improves deserialization performance of cc_serialization_perftest by about 25~30%.

BUG= 624459 
NO_DEPENDENCY_CHECKS=true

Review-Url: https://codereview.chromium.org/2199043002
Cr-Commit-Position: refs/heads/master@{#409212}
Commit  : 1b78a8928c31188e2ca1e24d031031fd619dba7b
Date    : Tue Aug 02 17:11:32 2016


===== TESTED REVISIONS =====
Revision         Mean    Std Dev  N  Good?
chromium@409194  2712.0  4.47214  5  good
chromium@409211  2722.0  4.47214  5  good
chromium@409212  3606.0  5.47723  5  bad    <--
chromium@409213  3584.0  5.47723  5  bad
chromium@409214  4316.0  11.4018  5  bad
chromium@409216  4342.0  8.3666   5  bad
chromium@409220  4294.0  20.7364  5  bad
chromium@409228  4122.0  8.3666   5  bad

Bisect job ran on: linux_perf_bisect
Bug ID: 634024

Test Command: ./src/out/Release/cc_perftests --test-launcher-print-test-stdio=always --verbose
Test Metric: StructTraits deserialization/num runs in 2 seconds: DelegatedFrame_ManyQuads_1_4000
Relative Change: 51.99%
Score: 99.9

Buildbot stdio: http://build.chromium.org/p/tryserver.chromium.perf/builders/linux_perf_bisect/builds/6618
Job details: https://chromeperf.appspot.com/buildbucket_job_status/9005331429290814400


Not what you expected? We'll investigate and get back to you!
  https://chromeperf.appspot.com/bad_bisect?try_job_id=5822542690910208

| 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!

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/9cbbefdc8f2ee2b82b21d188b29bd9ae2629da6f

commit 9cbbefdc8f2ee2b82b21d188b29bd9ae2629da6f
Author: yzshen <yzshen@chromium.org>
Date: Thu Aug 04 20:58:57 2016

Improve gfx::Transform StructTraits.

This change significantly improves the performance of cc_serialization_perftest:

Two test cases are mostly not affected. For the rest, the serialization and deserialization performance is improved by 10%~20%.

BUG= 634024 

Review-Url: https://codereview.chromium.org/2210673002
Cr-Commit-Position: refs/heads/master@{#409898}

[modify] https://crrev.com/9cbbefdc8f2ee2b82b21d188b29bd9ae2629da6f/mojo/public/tools/bindings/generators/cpp_templates/struct_declaration.tmpl
[modify] https://crrev.com/9cbbefdc8f2ee2b82b21d188b29bd9ae2629da6f/mojo/public/tools/bindings/generators/cpp_templates/struct_definition.tmpl
[modify] https://crrev.com/9cbbefdc8f2ee2b82b21d188b29bd9ae2629da6f/ui/gfx/mojo/transform.mojom
[modify] https://crrev.com/9cbbefdc8f2ee2b82b21d188b29bd9ae2629da6f/ui/gfx/mojo/transform.typemap
[modify] https://crrev.com/9cbbefdc8f2ee2b82b21d188b29bd9ae2629da6f/ui/gfx/mojo/transform_struct_traits.h

Based on comment #3.