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https://issues.apache.org/jira/browse/FLEX-33865?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13812532#comment-13812532
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Maurice Amsellem commented on FLEX-33865:
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@ Benoit:
>when result is null, it's faster to return [ X , Y ] ; 
Consider I am dumb, and explain to me why 
return [ X, Y ] requires more allocation than   result = new Array() ;  
result[0] = X; result[1] = Y; return result;

>the screenshots (layout-2-desktop-memory.png, layout-1-desktop-memory.png) are 
>from a real world application on desktop.
I am assuming from  the screenshots titles that these are memory figures (I 
can't tell for sure, because the table headers are missing).
If so,  I need speed, not memory comparisons to evaluate the optimization.
If not, please tell me what figures refer to "time".


> ConstraintLayout / LayoutElementHelper are memory inefficient (and slow)
> ------------------------------------------------------------------------
>
>                 Key: FLEX-33865
>                 URL: https://issues.apache.org/jira/browse/FLEX-33865
>             Project: Apache Flex
>          Issue Type: Improvement
>          Components: Mobile: Performance, Spark: Layout
>    Affects Versions: Apache Flex 4.11.0
>         Environment: mobile desktop
>            Reporter: Benoit Wiart
>            Assignee: Maurice Amsellem
>              Labels: mobile, performance
>         Attachments: 0001-ConstraintLayout-optimizationsV2.patch, 
> layout-1-desktop-memory.png, layout-2-desktop-memory.png, 
> layout-3-mobile-memory.png
>
>
> ConstraintLayout / LayoutElementHelper are doing too many memory allocation.
> it's really bad on mobile
> the attached screenshots were taken on desktop



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