On Wed, Nov 28, 2012 at 09:20:57AM +0000, Simon Marlow wrote:
My personal opinion is that we should switch to dynamic-by-default on all x86_64 platforms, and OS X x86. The performance penalty for x86/Linux is too high (30%),
FWIW, if they're able to move from x86 static to x86_64 dynamic then there's only a ~15% difference overall: Run Time -1 s.d. ----- -18.7% +1 s.d. ----- +60.5% Average ----- +14.2% Mutator Time -1 s.d. ----- -29.0% +1 s.d. ----- +33.7% Average ----- -2.6% GC Time -1 s.d. ----- +22.0% +1 s.d. ----- +116.1% Average ----- +62.4%
I am slightly concerned about the GC overhead on x86_64/Linux (8%), but I think the benefits outweigh the penalty there, and I can probably investigate to find out where the overhead is coming from.
Improving this would also help the above, of course. Thanks Ian