On Tue, May 13, 2008 at 9:23 PM, Neal Alexander
I stripped the code down to just the parsec related stuff and retested it.
http://72.167.145.184:8000/parsec_test/Parsec2.prof http://72.167.145.184:8000/parsec_test/Parsec3.prof
And the parser with a 9mb (800 kb gziped) sample log file: http://72.167.145.184:8000/parsec_test.tar.gz
So I've been picking at some ways to speed up Parsec 3. I haven't had much success at this benchmark, but one thing confused me: In my hacked-up version, when I change the monadic type from a "data" declaration to a "newtype" declaration, I get a significant slowdown. In the program posted by Neal, I go from ~43 s with "data" to about 1 minute with a "newtype". Is this expected? I don't really understand why adding an extra layer of indirection should speed things up. -Antoine