The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/a740f7ec72a6bf88e269f52c5561dd57ffde1589

commit a740f7ec72a6bf88e269f52c5561dd57ffde1589
Author: dtseng <dtseng@chromium.org>
Date: Mon Dec 12 22:08:09 2016

Fix issues with sending tts queue lots of utterances

- $descendants for div's can be very expensive. For example, in Gmail, there is a focusable div that wraps almost the entire contents of the page. We end up generating Output for everything under the div and lag significantly when focus lands here.
Fix this by only taking the text content of divs as one large string.  $descendants had all output including rich formatting.
- live region output on alerts causes double output (and similar lag). For example, pressing '?' in Gmail triggers hundreds of runs inside of LiveRegion.
Fix this by ignoring live regions set on alert nodes.

TEST=navigate in Gmail.
BUG= 672955 
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:closure_compilation

Review-Url: https://codereview.chromium.org/2563173002
Cr-Commit-Position: refs/heads/master@{#437925}

[modify] https://crrev.com/a740f7ec72a6bf88e269f52c5561dd57ffde1589/chrome/browser/resources/chromeos/chromevox/cvox2/background/background_test.extjs
[modify] https://crrev.com/a740f7ec72a6bf88e269f52c5561dd57ffde1589/chrome/browser/resources/chromeos/chromevox/cvox2/background/live_regions.js
[modify] https://crrev.com/a740f7ec72a6bf88e269f52c5561dd57ffde1589/chrome/browser/resources/chromeos/chromevox/cvox2/background/live_regions_test.extjs
[modify] https://crrev.com/a740f7ec72a6bf88e269f52c5561dd57ffde1589/chrome/browser/resources/chromeos/chromevox/cvox2/background/output.js

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/120bb61b5fd467ef232a893bd7b040fc208ee4c4

commit 120bb61b5fd467ef232a893bd7b040fc208ee4c4
Author: dtseng <dtseng@chromium.org>
Date: Tue Dec 13 06:26:55 2016

Improve the speech panel's performance

Currently, ChromeVox sends all queued speech output to the speech panel.

This unfortunately causes performance issues.

For example, in Gmail, if ChromeVox sends ~500 utterances, which can happen if we have a large block of text (since we split on sentences), ChromeVox stops responding to key commands.

ChromeVox should stay responsive in any situation especially if a user taps on the control key repeatedly.

This change makes it so we only show the currently spoken text which gets around the potentially expensive calls to send text to the panel background page (which blocks).

BUG= 672955 
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:closure_compilation

Review-Url: https://codereview.chromium.org/2570593002
Cr-Commit-Position: refs/heads/master@{#438083}

[modify] https://crrev.com/120bb61b5fd467ef232a893bd7b040fc208ee4c4/chrome/browser/resources/chromeos/chromevox/host/chrome/tts_background.js

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/cc01623505fb20e30e21fc34614801be58758e56

commit cc01623505fb20e30e21fc34614801be58758e56
Author: David Tseng <dtseng@chromium.org>
Date: Tue Dec 13 23:29:23 2016

Improve the speech panel's performance

Currently, ChromeVox sends all queued speech output to the speech panel.

This unfortunately causes performance issues.

For example, in Gmail, if ChromeVox sends ~500 utterances, which can happen if we have a large block of text (since we split on sentences), ChromeVox stops responding to key commands.

ChromeVox should stay responsive in any situation especially if a user taps on the control key repeatedly.

This change makes it so we only show the currently spoken text which gets around the potentially expensive calls to send text to the panel background page (which blocks).

BUG= 672955 
TBR=dtseng@chromium.org

CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:closure_compilation

Review-Url: https://codereview.chromium.org/2570593002
Cr-Commit-Position: refs/heads/master@{#438083}
(cherry picked from commit 120bb61b5fd467ef232a893bd7b040fc208ee4c4)

Review-Url: https://codereview.chromium.org/2574013002 .
Cr-Commit-Position: refs/branch-heads/2924@{#478}
Cr-Branched-From: 3a87aecc31cd1ffe751dd72c04e5a96a1fc8108a-refs/heads/master@{#433059}

[modify] https://crrev.com/cc01623505fb20e30e21fc34614801be58758e56/chrome/browser/resources/chromeos/chromevox/host/chrome/tts_background.js

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/d0f1e3d1b5534b5b963f26f4e9e096ef3bc44bee

commit d0f1e3d1b5534b5b963f26f4e9e096ef3bc44bee
Author: David Tseng <dtseng@chromium.org>
Date: Tue Dec 13 23:42:17 2016

Merge to m56: Fix issues with sending tts queue lots of utterances

- $descendants for div's can be very expensive. For example, in Gmail, there is a focusable div that wraps almost the entire contents of the page. We end up generating Output for everything under the div and lag significantly when focus lands here.
Fix this by only taking the text content of divs as one large string.  $descendants had all output including rich formatting.
- live region output on alerts causes double output (and similar lag). For example, pressing '?' in Gmail triggers hundreds of runs inside of LiveRegion.
Fix this by ignoring live regions set on alert nodes.

TEST=navigate in Gmail.
BUG= 672955 
TBR=dtseng@chromium.org

CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:closure_compilation

Review-Url: https://codereview.chromium.org/2563173002
Cr-Commit-Position: refs/heads/master@{#437925}
(cherry picked from commit a740f7ec72a6bf88e269f52c5561dd57ffde1589)

Review-Url: https://codereview.chromium.org/2571963002 .
Cr-Commit-Position: refs/branch-heads/2924@{#480}
Cr-Branched-From: 3a87aecc31cd1ffe751dd72c04e5a96a1fc8108a-refs/heads/master@{#433059}

[modify] https://crrev.com/d0f1e3d1b5534b5b963f26f4e9e096ef3bc44bee/chrome/browser/resources/chromeos/chromevox/cvox2/background/background_test.extjs
[modify] https://crrev.com/d0f1e3d1b5534b5b963f26f4e9e096ef3bc44bee/chrome/browser/resources/chromeos/chromevox/cvox2/background/live_regions.js
[modify] https://crrev.com/d0f1e3d1b5534b5b963f26f4e9e096ef3bc44bee/chrome/browser/resources/chromeos/chromevox/cvox2/background/live_regions_test.extjs
[modify] https://crrev.com/d0f1e3d1b5534b5b963f26f4e9e096ef3bc44bee/chrome/browser/resources/chromeos/chromevox/cvox2/background/output.js

[Automated comment] There appears to be on-going work (i.e. bugroid changes), needs manual review.