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From "Justin Mclean (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (FLEX-27905) Adding/Removing children to same parents sometimes causes unnecessary style invalidation
Date Sat, 04 May 2013 01:46:16 GMT

     [ https://issues.apache.org/jira/browse/FLEX-27905?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Justin Mclean updated FLEX-27905:
---------------------------------

    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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