[FLEX-34260] s:datagrid cacheAsBitmap caches an itemRenderer for every item in the dataProvider

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: Apache Flex 4.11.0, Apache Flex 4.12.0
• Fix Version/s: Apache Flex 4.14.0
• Component/s: Spark: DataGrid
• Labels: easytest
• Environment: Windows 7, FB 4.7, ie10
• Assignee: Unassigned
• Reporter: Jeff Spicer
• Created: 25/Apr/14 22:15
• Updated: 12/Dec/14 09:43
• Resolved: 12/Dec/14 09:43

Description

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

Issue Links

• relates to: FLEX-34644 Datagrid - Rectangle bounds problem