Repa provides high performance, regular, multi-dimensional, shape polymorphic parallel arrays. All numeric data is stored unboxed. Functions written with the Repa combinators are automatically parallel provided you supply +RTS -Nwhatever on the command line when running the program.
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PULL REQUESTS: If you want your pull request merged then send email to benl AT ouroborus.net. I don't pay attention to github notifications, but am happy to receive emails from people. Before raising your pull request make sure all the packages still build and that the examples still work.
If you just want to bump a dependency version then get a package maintainer or Hackage trustee to edit the package information directly on Hackage. You don't need to raise a pull request here.