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Last active Aug 29, 2015
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import Control.Exception (evaluate)
import Control.Monad (forM_)
import Control.Monad (replicateM, forM)
import qualified Data.ByteString.Lazy as BS
import qualified Data.Digest.CRC32
import qualified Data.Digest.Pure.CRC32
import System.Environment (getArgs)
import qualified System.Random.MWC as MWC
import Data.Binary (encodeFile, decodeFile)
import Data.Word (Word32)
:: MWC.GenIO
-> Int
-- ^ Desired length
-> IO BS.ByteString
randomByteString gen n = do
bytes <- replicateM n $ MWC.uniform gen
return $ BS.pack bytes
:: (BS.ByteString -> Word32)
-- ^ CRC32 function
-> [BS.ByteString] -> IO ()
bench digest bss = do
forM_ bss $ \bs -> do
forM_ [1..1000] $ \n -> do
evaluate $ digest $ BS.cons (fromIntegral n) bs
main :: IO ()
main = do
args <- getArgs
case args of
["generate"] -> do
gen <- MWC.create
bss1mB <- forM (replicate 10 1000000) $ randomByteString gen
encodeFile "data" bss1mB
["hask"] -> do
bss <- decodeFile "data"
bench Data.Digest.Pure.CRC32.crc32 bss
["c"] -> do
bss <- decodeFile "data"
bench Data.Digest.CRC32.crc32 bss
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