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From "Vitaliy Parfenov (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLEX-34260) s:datagrid cacheAsBitmap caches an itemRenderer for every item in the dataProvider
Date Wed, 08 Oct 2014 05:58:34 GMT

    [ https://issues.apache.org/jira/browse/FLEX-34260?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14163128#comment-14163128
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Vitaliy Parfenov commented on FLEX-34260:
-----------------------------------------

this bug appears since Apache Flex 4.10.0 after merging new spark:DataGrid features to Apache
Flex

> s:datagrid cacheAsBitmap caches an itemRenderer for every item in the dataProvider
> ----------------------------------------------------------------------------------
>
>                 Key: FLEX-34260
>                 URL: https://issues.apache.org/jira/browse/FLEX-34260
>             Project: Apache Flex
>          Issue Type: Bug
>          Components: Spark: DataGrid
>    Affects Versions: Apache Flex 4.11.0, Apache Flex 4.12.0
>         Environment: Windows 7, FB 4.7, ie10
>            Reporter: Jeff Spicer
>              Labels: easytest
>         Attachments: ItemRendererCachingBug.fxp
>
>
> setting cacheAsBitmap to true on a spark dataGrid allocates a lot of memory, noticeably
when the dataProvider is long.
> My guess is it's allocating enough memory to cache an itemRenderer for each item in the
dataprovider, whether it's showing or not.
> Steps to reproduce:
> (fxp attached)
> 1. create a spark dataGrid which has a dataProvider of length 1000
> 2. set cacheAsBitmap to true
> 3. run and profile memory usage
> a dataprovider of length 10,000 shows no significant spike in memory, using sdk 4.6.
> in 4.11/12, 10,000 items can cause !GCOD



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