A fast concurrent unique identifier supply with a pure API

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LTS Haskell 18.10:0.1.8@rev:1
Stackage Nightly 2021-09-18:0.1.8@rev:1
Latest on Hackage:0.1.8@rev:1

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BSD-3-Clause licensed by Edward A. Kmett
Maintained by Edward A. Kmett
This version can be pinned in stack with:concurrent-supply-,1576

Module documentation for

Used by 1 package in lts-3.22(full list with versions):

A fast supply of concurrent unique identifiers suitable for use within a single process. Once the initial Supply has been initialized, the remainder of the API is pure. See Control.Concurrent.Supply for details.



  • -fno-full-laziness was added to work around changes in the GHC inliner.


  • Claim to be Trustworthy
  • Added a simple example