Hello Joel, Friday, December 23, 2005, 12:49:19 PM, you wrote: JR> My current setup involves threads that block on a MVar/TMVar until JR> they read an event from it and then proceed. I would like to convert JR> these threads into continuations whereby a continuation is saved when JR> an event is requested and I can call that continuation when an even JR> arrives. hm... you are waste much time unsystematically "optimizing" random-selected parts of program. now it's time to stop jumping and start thinking the main mprovements drained by changing algorithms and not implementation details. profiling is only toold to know your program better but it can't replace careful planning and global vision. what you really need - is to ask questions about your global program structure instead of jumping between large number of techniques what you want to buy with continuations and, more important, why you need it? JR> Alternatively, I would appreciate an example that requests, say, two JR> Ints by saving a continuation each time and returns the sum. do a <- readLn :: IO Int b <- readLn :: IO Int return (a+b) or equivalent code readLn :: IO Int >>= \a -> readLn :: IO Int >>= \b -> return (a+b) amazed? :) -- Best regards, Bulat mailto:bulatz@HotPOP.com