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September 2017 Update

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Ingy döt Net 2017-09-23 10:01:46 +02:00
parent bba7bfd280
commit ba8067c3b7
14570 changed files with 153136 additions and 63871 deletions
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16
Task/Time-a-function/Haskell/time-a-function.hs
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@ -1,13 +1,13 @@
import System.CPUTime
import System.CPUTime (getCPUTime)
-- We assume the function we are timing is an IO monad computation
timeIt :: (Fractional c) => (a -> IO b) -> a -> IO c
timeIt action arg =
do startTime <- getCPUTime
action arg
finishTime <- getCPUTime
return $ fromIntegral (finishTime - startTime) / 1000000000000
timeIt action arg = do
startTime <- getCPUTime
action arg
finishTime <- getCPUTime
return $ fromIntegral (finishTime - startTime) / 1000000000000
-- Version for use with evaluating regular non-monadic functions
timeIt' :: (Fractional c) => (a -> b) -> a -> IO c
timeIt' f = timeIt (\x -> f x `seq` return ())
timeIt_ :: (Fractional c) => (a -> b) -> a -> IO c
timeIt_ f = timeIt ((`seq` return ()) . f)