On Wed, Mar 14, 2012 at 11:19 AM, Alexandre Bergel <[email protected]>wrote:
> Hi! > > Can someone confirm or infirm the following: A quick method (ie. the > compiled methods answer true to the message isQuick) is executed without > creating a stack frame. Is that true? > Yes, at least in the interpreter. In Cog, if jitted, such methods run in a leaf frame (only the return address is pushed), and additional tests in the JIT allow many other methods to run with only a leaf frame. See needsFrameNever: and needsFrameIfInBlock: and senders in the Cog VM source. If all the bytecodes in a method are marked with needsFrameNever: or needsFrameIfInBlock: then the method can be (and is) compiled frameless. if all the bytecodes in a block are marked with needsFrameNever: then the block can be (and is) compiled frameless. > > Cheers, > Alexandre > -- > _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: > Alexandre Bergel http://www.bergel.eu > ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;. > > > > > > > -- best, Eliot
