Bulat Ziganshin wrote:
Hello Simon,
Thursday, December 14, 2006, 2:35:12 PM, you wrote:
* Rework the block allocator
Simon, one more feature that i really missing in GHC now is ability to
*decrease* amount of memory allocated from OS. now, if at some point
program required 100 megs, it will hold all these 100 megs allocated until
program finishes and when mmeory goes low, this (unused!) memory will be
swapped to disk. can this be changed so that after GC memory returned back
to OS?
Yes. Maybe after a major GC if we detect that we have a lot more memory
allocated than was required by the previous GC, then we could release some. We
have to be careful to avoid thrashing, so I suggest only doing it after a major
GC and only when the extra memory exceeds some reasonably large threshold. I
don't know how this interacts with Esa's MBlock implementation on Windows.
Would you like to submit a feature request?
Cheers,
Simon
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