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Issue 724308 link

Starred by 1 user
Status: Archived
Owner:
caseq@chromium.org
Closed: Oct 2017
Cc:
l...@chromium.org
dgozman@chromium.org
Components:
EstimatedDays: ----
NextAction: ----
OS: Mac
Pri: 2
Type: Bug



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Performance improves with rendering options enabled

Reported by artlogic...@gmail.com, May 18 2017 
UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36

Steps to reproduce the problem:
1. Go to a particularly heavy webpage
2. Scroll and notice any dropped frames / jumpiness
3. Turn on any option under the 'rendering' tab such as the FPS meter
4. Repeat

What is the expected behavior?

What went wrong?
This is a really odd one, im noticing slightly worse performance on my brand new Macbook Pro, but when I try to improve the performance of the page by using the tools e.g. 'paint flashing' or 'fps meter' it actually makes the entire page completely smooth. This sort of makes the FPS meter useless as it is a perfect 60 fps.

Any ideas?

Did this work before? N/A 

Chrome version: 58.0.3029.110  Channel: stable
OS Version: OS X 10.12.4
Flash Version:

Comment 1 by l...@chromium.org, May 19 2017

Cc: dgozman@chromium.org l...@chromium.org
Thanks for the report, sounds like strange behavior.  Would you be able to provide an example site we could look at?  We might be able to help more if we can reproduce the issue ourselves, seeing what the site is doing and investigate.

A few questions:
- What user interactions are involved?  Is the site jumpy on load?  Only when you scroll?
- Is the performance bad / page dropping frames only when DevTools is open?  Does it get better with DevTools closed?
- Have you tried on a fresh profile?  Or on Canary?

Comment 2 by kavvaru@chromium.org, May 19 2017

Labels: Needs-Feedback

Comment 3 by dgozman@chromium.org, May 19 2017

Owner: caseq@chromium.org
Status: Assigned (was: Unconfirmed)
Maybe caseq has any ideas?

Comment 4 by pfeldman@chromium.org, Oct 5 2017

Status: Archived (was: Assigned)
Bulk DevTools triage, closing low priority issues with no action plan.
►

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