ContinuumIO/blaze — pull request #549 by mrocklin (2014-09-01 15:48:05+00:00)
Title: Refactor chunks to use compute_down

Rename `compute_one` to `compute_up`

When computing on chunks we want to push as much computation into a single in-memory operation as possible. Old chunks used compute_up, continuously creating new `ChunkIterator`s. This refactoring uses `compute_down` and calls a `compute(full_expr, ...)` on each chunk. This should both improve performance and be much more amenable to multiprocessing.