Re: [Haskell-cafe] newbie timing question

seanmcl:

Hello,

I'm trying to write a simple function to time an application.

-- this doesn't work

time f x = do n1 <- CPUTime.getCPUTime let res = f x in do n2 <- CPUTime.getCPUTime return (res,n2 - n1)

On a function that takes 8 seconds to complete, returns (True,46000000)

According to the documentation, this time is in picoseconds, making this 46 microseconds.

That thunk you're allocating with 'let' isn't going to help much ;) http://haskell.org/haskellwiki/Timing_computations Cheers, Don