@pinkerton, can you please also let us the know if this is noticed on a Retina or non-retina ?

Able to reproduce the issue on MacBook Pro Retina chrome version 52.0.2743.24 and canary - mouseover lags with mouse movement

This is working fine in stable version 51.0.2704.84 and hence a regression.

This got regressed in M52 and below is the info

Manual Bisect Info:
Good build: 52.0.2741.0
Bad build: 52.0.2742.0

CL : https://chromium.googlesource.com/chromium/src/+log/52.0.2741.0..52.0.2742.0?pretty=fuller&n=10000

Suspecting : https://codereview.chromium.org/1987203003

Please reassign if this is not related to your change.

just to update

Issue is repro on MacBook Pro Retina chrome version canary #53.0.2768.0	

shrike@, Could you please take a look 

A friendly reminder that M52 Stable is launching soon! Your bug is labelled as Stable ReleaseBlock, pls make sure to land the fix and get it merged into the release branch by July 12. All changes MUST be merged into the release branch by 5pm on July 15 to make into the desktop Stable final build cut. Thank you!

Just to update:
Still able to reproduce the issue on Mac 10.11.5 using latest M-53(53.0.2773.0).

shrike@ : Could you please take a look into this and update as the issue persists on latest canary 53.0.2777.0.

cl is ready except for fixing a broken test. Hopefully will land this today.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/b4e9a989d00a4753d2d6e1f5229da4ae9a302b5d

commit b4e9a989d00a4753d2d6e1f5229da4ae9a302b5d
Author: shrike <shrike@chromium.org>
Date: Thu Jun 23 18:47:03 2016

[Mac][Material Design] Improve bookmark folder menu performance.

This cl fixes a problem where if you move the mouse over an open
bookmark folder window, if you move the mouse fast enough the hover
state drawing begins to lag the mouse position.

R=tapted@chromium.org
BUG= 617803 

Review-Url: https://codereview.chromium.org/2073753004
Cr-Commit-Position: refs/heads/master@{#401663}

[modify] https://crrev.com/b4e9a989d00a4753d2d6e1f5229da4ae9a302b5d/chrome/browser/ui/cocoa/bookmarks/bookmark_bar_folder_controller.mm
[modify] https://crrev.com/b4e9a989d00a4753d2d6e1f5229da4ae9a302b5d/chrome/browser/ui/cocoa/bookmarks/bookmark_button.h

Does this still need to be merged?

** IMPORTANT change in M52 merge date due to first 2 weeks of July no release weeks **
M52 Stable is launching very soon! Your bug is labelled as Stable ReleaseBlock, pls make sure to land the fix and get it merged ASAP. All changes MUST be merged into the release branch by 5pm on July 1 to make into the desktop Stable final build cut. Thank you!

Your change meets the bar and is auto-approved for M52 (branch: 2743)

Re: #12, yes, but I needed to confirm that it was working in the Canary before asking for a merge, and a new Canary wasn't pushed until maybe 15 minutes ago.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/db6231c47a1c77461238237f14eb77464093c612

commit db6231c47a1c77461238237f14eb77464093c612
Author: Jayson Adams <shrike@chromium.org>
Date: Mon Jun 27 21:56:02 2016

[Mac][Material Design] Improve bookmark folder menu performance.

This cl fixes a problem where if you move the mouse over an open
bookmark folder window, if you move the mouse fast enough the hover
state drawing begins to lag the mouse position.

R=tapted@chromium.org
BUG= 617803 

Review-Url: https://codereview.chromium.org/2073753004
Cr-Commit-Position: refs/heads/master@{#401663}
(cherry picked from commit b4e9a989d00a4753d2d6e1f5229da4ae9a302b5d)

Review URL: https://codereview.chromium.org/2096303003 .

Cr-Commit-Position: refs/branch-heads/2743@{#489}
Cr-Branched-From: 2b3ae3b8090361f8af5a611712fc1a5ab2de53cb-refs/heads/master@{#394939}

[modify] https://crrev.com/db6231c47a1c77461238237f14eb77464093c612/chrome/browser/ui/cocoa/bookmarks/bookmark_bar_folder_controller.mm
[modify] https://crrev.com/db6231c47a1c77461238237f14eb77464093c612/chrome/browser/ui/cocoa/bookmarks/bookmark_button.h

Tested the issue on Mac 10.11.5 Retina using chrome version 52.0.2743.60.
mouseover hover followed mouse without any lag.
Please find the attached screen cast for the same.

Adding TE-Verified label

Thanks,

Deleted: bookmarks focus.mov 6.7 MB

bookmarks focus.mov 6.7 MB Download