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From "Petteri Tuovila (JIRA)" <>
Subject [jira] [Created] (FLEX-33282) Performance issue with multiple item renderers
Date Thu, 29 Nov 2012 14:36:59 GMT
Petteri Tuovila created FLEX-33282:

             Summary: Performance issue with multiple item renderers 
                 Key: FLEX-33282
             Project: Apache Flex
          Issue Type: Bug
          Components: Spark: DataGrid
    Affects Versions: Adobe Flex SDK 4.6 (Release)
         Environment: At least on mac
            Reporter: Petteri Tuovila

The problem is that the ItemRenderer's prepare is called for every visible ItemRenderer when
the mouse is moved over the grid and when starting and finishing item editing. Of course that
prepare function should be called when the renderers are first brought to stage at the initialization
and when you scroll up or down outside the screen when the renderers are recycled. 

We are using datasets that well fit the screen with multiple columns so this can really make
the program a little sluggish to use. When starting to edit there's easily a second or two
delay before editor appears, after the indicator catches up with the mouse. 

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