rrnewton
commented
13 years ago Perhaps the right way to do this is to tweak Repa to use Monad Par. Currently Repa uses a heavy-weight strategy where it spawns a set of IO threads to do the work.
See forkGang: http://code.ouroborus.net/repa/repa-stable/repa/Data/Array/Repa/Internals/Gang.hs
Related to Issue #9:
The monad-par package currently provides a "parMap" for everything traversable.
Sadly, this is woefully inefficient for data structures like arrays and Data.Vector, which can directly support a divide-and-conquer rather than element-wise traversal.
This raises the question of how best to add this functionality to vector. A separate vector-parallel package? Would that present any barriers to fusion laws (e.g. parallel maps fuse, and for that matter a serial + parallel map should perhaps fuse too).