boto/boto — pull request #968 by jamesls (2012-09-06 18:04:06+00:00)
Title: Reduce memory usage for chunk_hashes

On a 180MB file this reduced total memory usage by approximately 40%. This
was also marginally faster (but not by much).

I've also added the start of unittests for the writer module, and I've
written some very basic unittests for the chunk_hashes function.