On Jun 4, 2009, at 10:05 AM, Simon Peyton-Jones wrote:
What would really help is a self-contained program that demonstrates the problem. Maybe that's what you've supplied. I'm confused though. You say If I remove any of them (one is enough) then the program finishes in about 10 seconds and runs in constant space (< 3 MB) with optimisations.
Are you also saying this? If I leave all of them in, then the program takes ages and uses lots of space, if I use -O. But it's fine without -O.
Yes exactly, that is what happens with the program I attached. Morover, my original program uses lots of memory with and without -O (but it's fine without newtypes). I'll file a Trac bug report and supply both the condensed and the original program. Cheers, Sebastian -- Underestimating the novelty of the future is a time-honored tradition. (D.G.)