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Home/ Questions/Q 6790139
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Editorial Team
Asked: May 26, 20262026-05-26T17:41:23+00:00 2026-05-26T17:41:23+00:00

Does Haskell have a method for determining the number of CPU cores present on

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Does Haskell have a method for determining the number of CPU cores present on a machine at runtime?

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  1. Editorial Team
    Editorial Team
    2026-05-26T17:41:23+00:00Added an answer on May 26, 2026 at 5:41 pm

    Yes, there is such a method. Code from “Real World Haskell”: http://book.realworldhaskell.org/read/concurrent-and-multicore-programming.html

    import GHC.Conc (numCapabilities)
    
    main = putStrLn $ "number of cores: " ++ show numCapabilities
    
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