All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=747865

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=f7f98d011661a246052019dd49271a0de48e38776523ec50c42f6a3c75018b8c


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

win-high-dpi

Started bisect job https://chromeperf.appspot.com/buildbucket_job_status/8973193455068271856

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

Hi geofflang@chromium.org, the bisect results pointed to your CL, please take a look at the
results.


=== BISECT JOB RESULTS ===
Perf regression found with culprit

Suspected Commit
  Author : Geoff Lang
  Commit : df412bd5a319c948a882c7d9b620696facd5ff51
  Date   : Thu Jul 20 18:29:29 2017
  Subject: Lazily create shader translators and implement glReleaseShaderCompiler

Bisect Details
  Configuration: winx64_high_dpi_perf_bisect
  Benchmark    : loading.desktop
  Metric       : timeToFirstMeaningfulPaint_avg/pcv1-warm/amazon.co.jp
  Change       : 17.69% | 589.829642862 -> 694.188777778

Revision             Result                  N
chromium@488287      589.83 +- 205.029       14      good
chromium@488309      571.285 +- 19.0866      6       good
chromium@488315      571.802 +- 50.885       6       good
chromium@488316      559.598 +- 70.791       6       good
chromium@488317      680.569 +- 64.4665      6       bad       <--
chromium@488318      712.919 +- 177.028      6       bad
chromium@488320      684.747 +- 66.1889      6       bad
chromium@488331      683.119 +- 98.6855      6       bad
chromium@488374      675.145 +- 106.322      9       bad
chromium@488461      694.189 +- 211.692      9       bad

To Run This Test
  src/tools/perf/run_benchmark -v --browser=release_x64 --output-format=chartjson --upload-results --pageset-repeat=1 --also-run-disabled-tests --story-filter=amazon.co.jp loading.desktop

More information on addressing performance regressions:
  http://g.co/ChromePerformanceRegressions

Debug information about this bisect:
  https://chromeperf.appspot.com/buildbucket_job_status/8973193455068271856


For feedback, file a bug with component Speed>Bisection

I'm going to put the status to "Assigned" if you don't think this found the right CL please assign back to me and put the status to "Untriaged". Thanks!

 Issue 747878  has been merged into this issue.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/65d1cd6e7454a3fd383d0deeaaad67918f97be3b

commit 65d1cd6e7454a3fd383d0deeaaad67918f97be3b
Author: Geoff Lang <geofflang@chromium.org>
Date: Tue Jul 25 17:34:04 2017

Revert "Lazily create shader translators and implement glReleaseShaderCompiler"

This reverts commit df412bd5a319c948a882c7d9b620696facd5ff51.

Reason for revert: Translator released too early from shader objects causing the program binary cache to miss more often.

BUG=748202
BUG= 747865 

Original change's description:
> Lazily create shader translators and implement glReleaseShaderCompiler
> 
> ANGLE's shader translators hold a significant amount of memory for the
> builtin symbols.  By lazily creating the shader translator, it may never
> be intialized at all if all compiles hit the program binary cache.
> 
> BUG= 695135 
> 
> CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.win:win_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.android:android_optional_gpu_tests_rel
> 
> Change-Id: I095dd2efa33e111726db893cd14c3c3574bdd6ce
> Reviewed-on: https://chromium-review.googlesource.com/570540
> Reviewed-by: Kenneth Russell <kbr@chromium.org>
> Commit-Queue: Geoff Lang <geofflang@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#488317}

TBR=geofflang@chromium.org,kbr@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug:  695135 
Change-Id: Ieb3ec4069b263654f86818cd3d1f5ab83fc1c4ab
Cq-Include-Trybots: master.tryserver.chromium.win:win_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.android:android_optional_gpu_tests_rel
Reviewed-on: https://chromium-review.googlesource.com/585087
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#489354}
[modify] https://crrev.com/65d1cd6e7454a3fd383d0deeaaad67918f97be3b/gpu/command_buffer/service/gles2_cmd_decoder.cc
[modify] https://crrev.com/65d1cd6e7454a3fd383d0deeaaad67918f97be3b/gpu/command_buffer/service/shader_manager.cc

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/6ab76823251e56cfd00174f8621a7f63abfe0f25

commit 6ab76823251e56cfd00174f8621a7f63abfe0f25
Author: Geoff Lang <geofflang@chromium.org>
Date: Mon Jul 31 13:59:58 2017

Revert "Lazily create shader translators and implement glReleaseShaderCompiler"

This reverts commit df412bd5a319c948a882c7d9b620696facd5ff51.

Reason for revert: Translator released too early from shader objects causing the program binary cache to miss more often.

BUG=748202
BUG= 747865 

Original change's description:
> Lazily create shader translators and implement glReleaseShaderCompiler
>
> ANGLE's shader translators hold a significant amount of memory for the
> builtin symbols.  By lazily creating the shader translator, it may never
> be intialized at all if all compiles hit the program binary cache.
>
> BUG= 695135 
>
> CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.win:win_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.android:android_optional_gpu_tests_rel
>
> Change-Id: I095dd2efa33e111726db893cd14c3c3574bdd6ce
> Reviewed-on: https://chromium-review.googlesource.com/570540
> Reviewed-by: Kenneth Russell <kbr@chromium.org>
> Commit-Queue: Geoff Lang <geofflang@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#488317}

TBR=geofflang@chromium.org, kbr@chromium.org


(cherry picked from commit 65d1cd6e7454a3fd383d0deeaaad67918f97be3b)

Bug:  695135 
Change-Id: Ieb3ec4069b263654f86818cd3d1f5ab83fc1c4ab
Cq-Include-Trybots: master.tryserver.chromium.win:win_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.android:android_optional_gpu_tests_rel
Reviewed-on: https://chromium-review.googlesource.com/585087
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#489354}
Reviewed-on: https://chromium-review.googlesource.com/593853
Cr-Commit-Position: refs/branch-heads/3163@{#149}
Cr-Branched-From: ff259bab28b35d242e10186cd63af7ed404fae0d-refs/heads/master@{#488528}
[modify] https://crrev.com/6ab76823251e56cfd00174f8621a7f63abfe0f25/gpu/command_buffer/service/gles2_cmd_decoder.cc
[modify] https://crrev.com/6ab76823251e56cfd00174f8621a7f63abfe0f25/gpu/command_buffer/service/shader_manager.cc