Hello Malcolm, Wednesday, January 18, 2006, 4:22:23 PM, you wrote:
I'm running GHC and GCC head-to-head on the task of adding a bunch of long IOUArray-Vectors really fast. My machine is a Linux-ppc PowerBook and gets a runtime for the GHC-compiled binary that's about 10x as long as for GCC.
MW> Is it possible that gcc is making use of the ppc AltiVec instructions, MW> and ghc is not? :) even C version performs only 20 millions of additions in one second because this program is most limited by memory throughput - it access to 24 memory bytes per each addition. GHC just can't produce simple loops even for "imperative" code. JHC can be much better in that area, i strongly recommend Sven to try it -- Best regards, Bulat mailto:bulatz@HotPOP.com