17 Jun
2007
17 Jun
'07
4:50 a.m.
simonmarhaskell:
Henning Thielemann wrote:
The program is compiled with GHC-6.4 and option -O2, CPU clock 1.7 GHz.
ByteString is much faster with GHC 6.6, IIRC. We optimised the representation of ForeignPtr, and ByteString takes advantage of that. I recommend upgrading.
Yes, a 2x speedup isn't uncommon. ByteString is even faster with the GHC head, branch, given the cranked up rules and constructor specialisation. -- Don