Hello glasgow-haskell-users, 1) can you add disableGC and enableGC procedures? this can significantly improve performance in some cases 2) if, for example, program's data before GC is 80 mb and after GC is 60 mb then the program will occupy after GC the whole 140 mb and ALL this space will be marked by OS as used! if there's a memory shortage, old program data even can be swapped to disk despite the fact that we absolutely don't need them! that behaviour significantly enlarge memory needs of GHC-compiled programs if this unused memory will be returned to OS or marked as unneeded after GC then will problem will go on. preferably this must be done during the time of GC, on each page which contents has been already compacted. in this case such program will never use more than 80mb of real memory (+ 1 page + memory for GC) -- Best regards, Bulat mailto:bulatz@HotPOP.com