Jon and I have posted [Episode 3][1] of the Drunk on Software video podcast. In this episode we talk about some of the real world performance issues with Flex's ArrayCollection. We've also created a few demos which illustrate how in some cases ArrayCollection is 26 times slower than Array:

  * [Instancing Array vs ArrayCollection Performance][2] ([view source][3])
  * [Adding items to Array vs ArrayCollection Performance][4] ([view source][3])

Let us know what you think.

 [1]: http://www.drunkonsoftware.com/2008/11/20/episode-3-performance-pitfalls-of-flexs-arraycollection/
 [2]: http://www.jamesward.com/demos/ArrayCollectionPerformance/InstancePerformance.html
 [3]: http://www.jamesward.com/demos/ArrayCollectionPerformance/srcview/index.html
 [4]: http://www.jamesward.com/demos/ArrayCollectionPerformance/ArrayCollectionPerformance.html