On Thu, Apr 02, 2009 at 07:55:07PM -0400, Rick R wrote: > You could profile your app for memory usage. Then you could figure out just > what function is blowing up the mem usage and figure out how to optimize it. > > > http://book.realworldhaskell.org/read/profiling-and-optimization.html > > > 2009/4/2 <lu...@die.net.au> > > > I'm relatively new to haskell so as one does, I am rewriting an > > existing program in haskell to help learn the language. > > > > However, it eats up all my RAM whenever I run the program. > > > > http://hpaste.org/fastcgi/hpaste.fcgi/view?id=3175#a3175 > > > > Obviously I'm doing something wrong, but without my magical FP pants I > > don't know what that might be. > >
I ran some profiling as suggested, [SNIP] total time = 8.36 secs (418 ticks @ 20 ms) total alloc = 3,882,593,720 bytes (excludes profiling overheads) COST CENTRE MODULE %time %alloc line PkgDb 89.7 93.5 COST CENTRE MODULE no. entries %time %alloc %time %alloc line PkgDb 305 109771 89.7 93.3 89.7 93.3 [SNIP] The line function is part of the file parser line :: Parser String line = anyChar `manyTill` newline files' :: Parser Files files' = line `manyTill` newline Perhaps I should also explain the structure of the file. It's for a simple package manager called pkgutils, used for CRUX[1]. The file contains information for all the packages installed and is structured as follows <package name> <package version> <file> <file> ... <file> <package name> ... From profiling it shows that the memory is simple consumed by reading in all the lines, the graph from using -p -hd shows an almost Ologn2 growth of the heap as the collection of lines grows. Is there a better way to do this? [1] http://crux.nu -- Lucas Hazel <lu...@die.net.au>
pgplYxxA2pBsy.pgp
Description: PGP signature
_______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
