I'm talking about item editors movement by TAB key.
In mx:DataGrid, it moves quickly. However, I feel it's slow in s:DataGrid.
I investigated source of classes related with s:DataGrid a little.
I found three reasons.
1) s:GridItemEditor uses s:TextArea
2) grid.focusManager.getNextFocusManagerComponent takes dozens of milliseconds in editor_keyFocusChangeHandler function of s:DataGridEditor
3) it calls the validateNow method in do while loop at ensureCellIsVisible function of s:Grid
We can avoid 1) by using custom light-weight editor. But we can't avoid 2) and 3).
Why is 2) needed?
When I comment out 3), the focus moves incorrectly at rendererIsEditor column.
However, there should be other ways without calling validateNow.
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