* Serge D. Mechveliani <mech...@botik.ru> [2012-10-17 19:37:38+0400] > But it is generally difficult for me to admit that sometimes it is > desirable to use strinctess annotation. > I programmed DoCon for 6 years, and it does not have any bit of > strictness annotation, and I always had an impression that it is all > right with performance.
Yeah, I was also surprised that this is news to you :) > And now it occurs that setting $! in some places may make many parts > of it somewhat 100 times less expensive > -- ? > Somehow difficult to admit. Laziness is subtle. Sometimes you make an innocent change to a program, but it changes the time when things are evaluated, and that affects memory/performance significantly. In general, you'd rather understand evaluation order in your program if you want decent performance. Roman _______________________________________________ Glasgow-haskell-users mailing list Glasgow-haskell-users@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
