how to efficiently apply a medium-weight function in parallel

Question

I\'m looking to map a modestly-expensive function onto a large lazy seq in parallel. pmap is great but i\'m loosing to much to context switching. I think I need

Answer 1

If you don't mind something slightly exotic (in exchange for some really noticeable speedup), you might also want to look into the work done by the author of the Penumbra-library, which provides easy access to the GPU.