, Corey von Birnbaum reviewed all the major 4 flash SWF protectors and actionscriopt 3 obfuscators. He comes to this conclusion:
Overall I’d say irrFuscator
takes the cake for being reasonably-priced and offering that Flex Project option which makes it very powerful, yet it still retains simplicity of use through an easy user experience, plus the program itself was fast to load and responsive. The others were written in Java or were otherwise slow to start, so they were a bit sluggish.
Nice, so irrFuscator
pretty much won. Full review here