Thu Jan 28 04:44:54 PST 2010 Simon Marlow <[email protected]>
* tweak the totally-bogus arbitrary stack-squeezing heuristic to fix #2797
In #2797, a program that ran in constant stack space when compiled
needed linear stack space when interpreted. It turned out to be
nothing more than stack-squeezing not happening. We have a heuristic
to avoid stack-squeezing when it would be too expensive (shuffling a
large amount of memory to save a few words), but in some cases even
expensive stack-squeezing is necessary to avoid linear stack usage.
One day we should implement stack chunks, which would make this less
expensive.
M ./rts/ThreadPaused.c -1 +2
View patch online:
http://darcs.haskell.org/ghc-6.12/ghc/_darcs/patches/20100128124454-12142-a9f4f2a02ccc9058c40c2538433d4dfd41f89978.gz
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