[FLEX-33893] CSSStyleDeclaration is inefficient during style matching

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: Apache Flex 4.11.0
• Fix Version/s: Apache Flex 4.12.0
• Component/s: Mobile: Performance, Performance: Framework, Styles
• Labels: memory patch performance
• Environment: desktop mobile
• Assignee: Justin Mclean
• Reporter: Benoit Wiart
• Created: 11/Nov/13 21:38
• Updated: 01/Jan/14 21:54
• Resolved: 01/Jan/14 21:54

Description

When no factory (or defaultFactory) is provided a new function is created when matching styles (addFactoryAndOverrideStylesToProtoChain, addStyleToProtoChain, applyFilter).
This is a major source of unneeded memory allocations (== GC)

The patch re-use a single function as the prototype is always reseted
This should be reviewed by an actionscript ninja