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https://issues.apache.org/jira/browse/FLEX-27905?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Justin Mclean updated FLEX-27905:
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Labels: performance (was: )
> Adding/Removing children to same parents sometimes causes unnecessary style
> invalidation
> ----------------------------------------------------------------------------------------
>
> Key: FLEX-27905
> URL: https://issues.apache.org/jira/browse/FLEX-27905
> Project: Apache Flex
> Issue Type: Bug
> Components: Styles
> Affects Versions: Adobe Flex SDK 4.5.1 (Release)
> Environment: Affected OS(s): All OS Platforms
> Language Found: English
> Reporter: Adobe JIRA
> Labels: performance
>
> Steps to reproduce:
> 1. Run attached PerformanceTests3.mxml -- remove the monkey-patched version
> of UIComponent
> 2. Notice how slow remove and then re-adding those 200 Groups are (each
> Group has 10 Button children)
>
> Actual Results:
> Since adding/removing to the same parent (and the styles haven't changed),
> styles shouldn't need to be regenerated. Unfortunately, for a typical
> application, especially when using includeIn/excludeFrom with state, this can
> happen a lot. On my computer, the time it takes for me is:
> 430ms, 2159ms, 18ms (code, validation, render)
>
> Expected Results:
> After a few changes (will explain in comment below), the result I was
> getting on my computer was:
> 88ms, 13ms, 18ms (code, validation, render)
> On more complicated examples, with more children and more styles, this can
> make an even bigger difference
>
> Workaround (if any):
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