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https://issues.apache.org/jira/browse/FLEX-34467?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14246080#comment-14246080
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Vadim Usoltsev commented on FLEX-34467:
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Yeah, seems that it's ok in the last build. Thank you!
> Spark DataGrid performance extremely decreased since "gridView" is introduced.
> ------------------------------------------------------------------------------
>
> Key: FLEX-34467
> URL: https://issues.apache.org/jira/browse/FLEX-34467
> Project: Apache Flex
> Issue Type: Bug
> Components: Spark: DataGrid
> Affects Versions: Apache Flex 4.11.0, Apache Flex 4.12.0, Apache Flex
> 4.13.0, Apache Flex 4.12.1
> Reporter: Vadim Usoltsev
> Priority: Critical
>
> Since there is gridView appeared in DataGridSkin the performance of the
> component is extremely decreased. By performance I mean update display list
> operations. At the moment the overall performance depends on data provider
> size, but this is contrary to the principle of the DataGrid when you can
> display huge amount of data with limited amount of item renderers instances.
> How to reproduce:
> Create s:DataGrid with a few columns, generate dataProvider with objects
> corresponging to the columns. For ~500 objects you will already see visible
> rendering lugs, just move your mouse over the grid or try to scroll. For
> ~2000 objects DataGrid becomes totally unusable.
> This behaviour can be reproduced in 4.11-4.13 flex SDK versions, while in
> 4.5.1 and even in 4.9.1 everything is Okey.
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