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Issue metadata

Status: Assigned
Owner:
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: Android
Pri: 2
Type: Bug-Regression



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bad perfomace with <canvas> when you use more than one touch point and fullscree is not activated

Reported by xy...@t-online.de, Nov 19

Issue description

Steps to reproduce the problem:
1. Open the attached file or load https://jannnis.de.cool/SIA_HTML/steuerung4in1.html
2. Move the slide controllers simultaneously
3. Press the fullscreen icon and move the slide controllers simultaneously again

What is the expected behavior?
The perfomace should always be similar.

What went wrong?
The performace is significantly worse in non fullscreen mode

Did this work before? N/A 

Does this work in other browsers? Yes

Chrome version: 69.0.3497.100  Channel: stable
OS Version: 8.0
Flash Version: 

I tested this in different chromium-based browser and they all show same behaiviour.
 
steuerung4in1.html
11.2 KB View Download
Labels: Needs-triage-Mobile
Cc: chelamcherla@chromium.org
Labels: -Type-Bug -Pri-2 Target-70 Target-71 Target-72 FoundIn-72 M-72 Triaged-Mobile FoundIn-71 FoundIn-70 Pri-1 Type-Bug-Regression
Status: Untriaged (was: Unconfirmed)
Tested the issue in Android and able to reproduce the issue. 

Steps Followed:
1. Navigated to  https://jannnis.de.cool/SIA_HTML/steuerung4in1.html
2. Moved slide controllers simultaneously and observed slowness in movement

Chrome versions tested:
69.0.3497.100 , 70.0.3538.110 ,72.0.3616.0

OS:
Android 9.0.0

Android Devices:
Pixel 2 XL


Good Build - 61.0.3163.0
Bad Build - 62.0.3164.0 

Observing all good builds while performing per-revision bisect, altered the range and even now observing all good builds. Hence providing manual CL

CR: https://chromium.googlesource.com/chromium/src/+log/61.0.3163.0..62.0.3164.0?pretty=fuller&n=10000

Could someone from Blink>Canvas please help in assigning to appropriate owner.

Thanks!
Owner: aaronhk@chromium.org
Status: Assigned (was: Untriaged)
Labels: -Pri-1 -Target-70 -Target-71 -Target-72 Target-73 Pri-2
Things that regressed in M-62 are not high priority regressions right now. Reducing priority.

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