On Wed, Nov 21, 2007 at 01:31:35PM +0000, Gracjan Polak wrote:
Hi,
My program is eating too much memory:
The source.txt is 800kb, and I expect files of size 100 times more, say 80MB, so using -H800M will not help here much.
The profile -p says:
COST CENTRE MODULE %time %alloc
xparse PdfModel 78.1 95.0
You're using the wrong type of profiling for this job. -p is intended for people who want their programs to go faster; and %alloc is raw allocations, showing how to divide the GC cost. Since you are allocating 100 times more data than is being retained, the %alloc figures are quite uncorrelated with leakiness. But you don't want to make your program faster - you want to make it leaner. You want one of the heap profiling flags, described in: http://haskell.org/ghc/dist/current/docs/users_guide/prof-heap.html Note that heap profiling is even more a black art than time profiling; you may need to do a lot of experimentation to find an enlightening profile. Stefan