Created
June 2, 2010 23:35
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threadDelay :: Int -> IO () Source | |
Suspends the current thread for a given number of microseconds (GHC only). | |
There is no guarantee that the thread will be rescheduled promptly when the delay has expired, but the thread will ***never continue to run earlier than specified***. | |
--- | |
module Main where | |
import Criterion.Main | |
import Control.Concurrent | |
sleep1 = do | |
threadDelay 1000000 | |
return () | |
main :: IO () | |
main = defaultMain [bench "1 sec delay" $ whnfIO sleep1 ] | |
--- | |
warming up | |
estimating clock resolution... | |
mean is 9.540081 us (80001 iterations) | |
found 1384 outliers among 79997 samples (1.7%) | |
1221 (1.5%) high severe | |
estimating cost of a clock call... | |
mean is 193.1040 ns (62 iterations) | |
found 4 outliers among 62 samples (6.5%) | |
1 (1.6%) low severe | |
1 (1.6%) low mild | |
2 (3.2%) high severe | |
benchmarking 1 sec delay | |
collecting 100 samples, 1 iterations each, in estimated 100.1319 s | |
bootstrapping with 100000 resamples | |
mean: 1.001000 s, lb 1.000953 s, ub 1.001030 s, ci 0.950 | |
std dev: 192.3861 us, lb 131.5291 us, ub 265.3644 us, ci 0.950 | |
found 14 outliers among 100 samples (14.0%) | |
10 (10.0%) low severe | |
3 (3.0%) high mild | |
1 (1.0%) high severe | |
variance introduced by outliers: 0.990% | |
variance is unaffected by outliers |
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