For performance reasons I would like to use Array methods to directly
manipulate an array acting as a List component's dataProvider. After
One more thing you could try instead of manipulating the underlying Array directly is, calling disableAutoUpdate() before you make a major update and then calling enableAutoUpdate() just after. This would ensure that the view isnt updated after each addItem(), instead the events would be queued and dispatched when the enableAutoUpdate is called. This would be faster than calling addItem() multiple times with auto-update enabled. But I am not sure if this would be faster than the technique you are currently using.
-rishi
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