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AVM2 is Adobes virtual machine in Flash Player 9, that executes ActionScript3 (AS3) bytecode. If you are accustomed to writing code for the great JVM and are starting to write Flex or AIR applications, there are things you should be aware of. In this blog, I present information on how the AVM2 works, and also show some tips on how to make your code perform better on AVM2. Most of the information in this blog should be credited to Gary Grossman from Adobe. I found a (great) presentation with his name on it, entitled "ActionScript 3.0 and AVM2: Performance Tuning". I was mostly interested in the AVM2 part, and luckily, the 74 pages of the presentation had quite a bit of information on that subject.