weigh
Measure allocations of a Haskell functions/values
https://github.com/fpco/weigh#readme
| Version on this page: | 0.0.16@rev:1 |
| LTS Haskell 24.17: | 0.0.18 |
| Stackage Nightly 2025-10-26: | 0.0.18 |
| Latest on Hackage: | 0.0.18 |
Maintained by [email protected]
This version can be pinned in stack with:
weigh-0.0.16@sha256:cfd5dd99d3e0a18ff3156050f7696e55b51b95832e88554a7a3161f15cb8e178,1196Module documentation for 0.0.16
weigh 
Measures the memory usage of a Haskell value or function
Limitations
- :warning: Turn off the
-threadedflag, otherwise it will cause inconsistent results.
Example use
import Weigh
main :: IO ()
main =
mainWith
(do func "integers count 0" count 0
func "integers count 1" count 1
func "integers count 10" count 10
func "integers count 100" count 100)
where
count :: Integer -> ()
count 0 = ()
count a = count (a - 1)
Output results:
| Case | Allocated | GCs |
|---|---|---|
| integers count 0 | 16 | 0 |
| integers count 1 | 88 | 0 |
| integers count 10 | 736 | 0 |
| integers count 100 | 7,216 | 0 |
Output by default is plain text table; pass --markdown to get a
markdown output like the above.