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{-# LANGUAGE BangPatterns, OverloadedStrings #-}
import Control.Exception
import Control.Monad
import Data.Aeson
import Data.Attoparsec (IResult(..), parseWith)
import Data.Char (isDigit)
import Data.Time.Clock
import System.Environment (getArgs)
import System.IO
import qualified Data.ByteString as B
import Control.DeepSeq
main :: IO ()
main = do
args0 <- getArgs
let (cnt,args) = case args0 of
(i:c:a) | all isDigit i && all isDigit c -> (c,a)
(c:a) -> (c,a)
let count = read cnt :: Int
forM_ args $ \arg -> bracket (openFile arg ReadMode) hClose $ \h -> do
putStrLn $ arg ++ ":"
let refill = B.hGet h 16384
result0 <- parseWith refill json =<< refill
r0 <- case result0 of
Done _ r -> return r
_ -> fail $ "failed to read " ++ show arg
start <- getCurrentTime
let loop !n r
| n >= count = return ()
| otherwise = {-# SCC "loop" #-} do
rnf (encode r) `seq` loop (n+1) r
loop 0 r0
delta <- flip diffUTCTime start `fmap` getCurrentTime
let rate = fromIntegral count / realToFrac delta :: Double
putStrLn $ " " ++ cnt ++ " good, " ++ show delta
putStrLn $ " " ++ show (round rate :: Int) ++ " per second"
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