On Wed, Mar 14, 2012 at 11:19 AM, Alexandre Bergel
<alexandre.bergel@me.com> 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
--
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Alexandre Bergel �http://www.bergel.eu
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