text / tests / benchmarks / Ordering.hs

The default branch has multiple heads

import System.Environment
import qualified Data.ByteString.Char8 as B
import qualified Data.ByteString.Lazy.Char8 as BL
import qualified Data.Text as T
import qualified Data.Text.Encoding as T
import qualified Data.Text.Lazy as TL
import qualified Data.Text.Lazy.Encoding as TL

every :: Int -> [a] -> [a]
every k = go k
  where go n (x:xs)
          | n < k     = go (n+1) xs
          | otherwise = x : go 1 xs
        go _ _        = []

func :: (Ord a) => [a] -> IO ()
func ls = print . sum . map f $ every 1000 ls
    where f needle = length . filter ((==GT) . compare needle) $ ls

-- Test a comparison that could be fused: compare (toLower a) (toLower b)
func1 ls = print . sum . map f $ every 1000 ls
    where f needle = length . filter ((==GT) . compare (T.toLower needle) . T.toLower) $ ls

bytestring haystack = func =<< B.lines `fmap` B.readFile haystack

lazyBytestring haystack = func =<< BL.lines `fmap` BL.readFile haystack

text haystack = func =<< (T.lines . T.decodeUtf8) `fmap` B.readFile haystack

lazyText haystack = func =<<
                    (TL.lines . TL.decodeUtf8) `fmap` BL.readFile haystack

string haystack = func =<< lines `fmap` readFile haystack

main = do
  args <- getArgs
  case args of
    ["bs",h] -> bytestring h
    ["lazybs",h] -> lazyBytestring h
    ["text",h] -> text h
    ["lazytext",h] -> lazyText h
    ["string",h] -> string h
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