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POProgramming language for functional parallelism: F# vs Haskell
 

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  1. POProgramming language for functional parallelism: F# vs Haskell
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    <p>Functional programming has immutable data structures and no side effect which are inherently suitable for parallel programming. I investigate how to exploit multicore computation in a functional language, and target production code for some numerical applications.</p> <p>F# has Microsoft behind its back, and its parallel constructs such as <a href="http://msdn.microsoft.com/en-us/magazine/cc163329.aspx" rel="noreferrer">PLINQ</a>, <a href="http://msdn.microsoft.com/en-us/library/dd460717.aspx" rel="noreferrer">TPL</a>, <a href="http://blogs.msdn.com/b/dsyme/archive/2007/10/11/introducing-f-asynchronous-workflows.aspx" rel="noreferrer">Async Workflow</a> have been well-documented and shown some potentials. However, research about parallelism in Haskell is very active at the moment, and it posseses many nice features which haven't been supported by F# yet:</p> <ul> <li><a href="http://www.haskell.org/haskellwiki/GHC/Data_Parallel_Haskell" rel="noreferrer">Data Parallel Haskell</a></li> <li><a href="http://hackage.haskell.org/packages/archive/parallel/3.1.0.1/doc/html/Control-Parallel.html" rel="noreferrer">par and pseq</a></li> <li><a href="http://hackage.haskell.org/packages/archive/parallel/3.1.0.1/doc/html/Control-Parallel-Strategies.html" rel="noreferrer">Strategies</a></li> <li><a href="http://www.haskell.org/haskellwiki/Software_transactional_memory" rel="noreferrer">Software Transactional Memory</a></li> </ul> <p>My question is which language I should choose for functional parallelism? If F# is chosen, are there any pointers to build up what they currently have in Haskell?</p> <p><strong>UPDATE:</strong></p> <p>I chose Simon's answer because it brought out some nice discussion about garbage collector, memory allocation and cache miss. I will stick to F#, and I think these answers are helpful for me to study functional parallelism.</p>
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    1. COGHC has Microsoft behind it as well: most of the principals work for Microsoft Research Cambridge and working on GHC is their job.
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    2. COAnd the new parallel & deterministic library: http://www.reddit.com/r/haskell/comments/gainp/a_monad_for_deterministic_parallelism_icfp2011/
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    3. COF# isn't pure, for example even though Haskell's STM is ported to F# (http://cs.hubfs.net/blogs/hell_is_other_languages/archive/2008/01/16/4565.aspx) compiler cannot prevent "side-effective" code inside STM.
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