A library for parallel programming based on a monad

Version on this page:0.3.5@rev:2
LTS Haskell 21.13:0.3.5@rev:2
Stackage Nightly 2023-06-21:0.3.5@rev:2
Latest on Hackage:0.3.6

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BSD-3-Clause licensed by Simon Marlow, Ryan Newton
Maintained by Simon Marlow, Ryan Newton
This version can be pinned in stack with:monad-par-0.3.5@sha256:5f69fb694f3e5185088f9121613a164e87871f1d8ee563cfec57eabcc1bd96e0,6536

The Par monad offers a simple API for parallel programming. The library works for parallelising both pure and IO computations, although only the pure version is deterministic. The default implementation provides a work-stealing scheduler and supports forking tasks that are much lighter weight than IO-threads.

For complete documentation see Control.Monad.Par.

Some examples of use can be found in the examples/ directory of the source package.

Other related packages:

  • abstract-par provides the type classes that abstract over different implementations of the Par monad.

  • monad-par-extras provides extra combinators and monad transformers layered on top of the Par monad.

Changes in 0.3.4 relative to 0.3:

  • Fix bugs that cause "thread blocked indefinitely on MVar" crashes.

  • Added Control.Monad.Par.IO