blob: 5025582ebe0ea08eb7faf7077c625675ff2e9eee (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
|
{-# LANGUAGE PatternSignatures #-}
import Control.Monad
import Control.Parallel
import System.Environment
import System.Random
sort (x:xs) = sort lesser ++ [x] ++ sort greater
where lesser = filter (< x) xs
greater = filter (>= x) xs
sort _ = []
psort xs 10 = sort xs
psort (x:xs) d = let d' = d + 1
l = psort lesser d'
g = psort greater d'
in l `par` g `par` (l ++ [x] ++ g)
where lesser = filter (< x) xs
greater = filter (>= x) xs
psort _ _ = []
main = do
args <- getArgs
let counts | null args = [100000]
| otherwise = map read args
rs :: [Int] <- randoms `fmap` getStdGen
forM_ counts $ \k -> do
let xs = take k rs
print . length $ xs
-- s <- getCurrentTime
print . length $ psort xs 0
-- e <- getCurrentTime
-- print (e `diffUTCTime` s)
|
