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From "Jeff Spicer (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLEX-34260) spark datagrid cacheAsBitmap caches every item in the dataProvider
Date Mon, 28 Apr 2014 18:54:14 GMT

    [ https://issues.apache.org/jira/browse/FLEX-34260?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13983386#comment-13983386
] 

Jeff Spicer commented on FLEX-34260:
------------------------------------

using a filter (I tested GlowFilter) on a parent container also causes a similar memory spike.

> spark datagrid cacheAsBitmap caches 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
>
> 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:
> 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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