[FLEX-22431] DataGroup leaks ItemRenderers when layout.useVirtualLayout=true and itemRendererFunction != null

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: Adobe Flex SDK 4.5 (Release)
• Component/s: Spark: DataGroup
• Environment: Affected OS(s): All OS Platforms; Language Found: English
• Assignee: Adobe JIRA
• Reporter: Adobe JIRA
• Created: 14/Dec/09 10:52
• Updated: 12/Jan/10 20:51
• Resolved: 15/Dec/09 16:03

Description

Steps to reproduce:
DataGroup adds ItemRenderers to its internal free list when recycling isn't possible, notably when itemRendererFunction != null. If dataProvider.length is large, this is a significant memory leak.

The attached application demonstrates the problem. Monitor the application's heap size with TaskManager and slowly scroll from one end to the other.

Actual Results: Memory usage grows without bounds.

Expected Results: Memory usage peaks after a few seconds and is held in check by the GC.

Workaround (if any):