The 9712 Flex performance is much improved, great job!
There are a couple slow downs that seem to persist. I see that http://www.jetbrains.net/jira/browse/IDEADEV-34140 was resolved, I am still seeing a very sluggish/hanging IDE switching to view an AS file with more than 250 lines or so.
The same applies to switching to an .mxml file.
I took a couple snapshots and attached them, maybe they are related, maybe not.
this is on OS X 10,5,6
java options: -Xms32m -Xmx2056m -XX:MaxPermSize=256m -Xbootclasspath/a:../lib/boot.jar -ea -server -agentlib:yjpagent=disablej2ee -Dsun.awt.keepWorkingSetOnMinimize=true