performance slowdown after mousedown in element with many display:none children
Reported by
er...@mediamods.com,
Mar 30 2017
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Issue descriptionUserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2987.98 Safari/537.36 Steps to reproduce the problem: DEMONSTRATION OF PROBLEM: http://codepen.io/jedierikb/pen/wJQNgv?editors=1010 Create an element and populate it with many children (~9000). Set each child's display to none. Append a few (~9) grandchildren to each child. After clicking a few times on this element, there is a precipitous drop in response time for mouse events anywhere else in the window. What is the expected behavior? If you click an element a few times, your mouse movements should be fast. What went wrong? If you click an element a few times, mouse response times in your window should not slow down. Did this work before? N/A Chrome version: 57.0.2987.98 Channel: n/a OS Version: OS X 10.12.4 Flash Version:
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Apr 4 2017
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Apr 5 2017
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Apr 24 2017
Notable: this bug results in even worse performance in Canary (Version 60.0.3079.0 (Official Build) canary (64-bit)). A double click results in a browser window slowdown even without wiggling the mouse!
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Apr 24 2017
here is a workaround: http://codepen.io/jedierikb/pen/jmMYaq but it does not work in canary.
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Apr 25 2018
This issue has been Available for over a year. If it's no longer important or seems unlikely to be fixed, please consider closing it out. If it is important, please re-triage the issue. Sorry for the inconvenience if the bug really should have been left as Available. For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot
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Apr 25 2018
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