Actionscript 3 :: Implement Macros In Flex/FlashDevelop?

Currently, i have been compiling my applications with FD/CS3 and want to make the switch to the flex compiler. One of the main things i want to experiment with the flex compiler is using Macros in AS3. For instance, say i have some extremely expensive operation that i wish to carry out:

private function Main():void
{
extremelyExpensiveOperation(params);
}

but i want to avoid the cost of a function lookup. So instead of using a function lookup I do something like

private function Main():void
{
<macro expandExtremelyExpensiveOperationHere(params)/>
}

obviously the syntax doesn't have to look exactly like that, but the macro gets expanded before compilation thus avoiding function lookup.