[Numpy-discussion] Enum/Factor NEP (now with code)

[Thouis (Ray) Jones]

On Wed, Jun 13, 2012 at 8:54 PM, Wes McKinney <wesmckinn at gmail.com> wrote:
> Nathaniel: my experience (see blog posting above for a bit more) is
> that khash really crushes PyDict for two reasons: you can use it with
> primitive types and avoid boxing, and secondly you can preallocate.
> Its memory footprint with large hashtables is also a fraction of
> PyDict. The Python memory allocator is not problematic-- if you create
> millions of Python objects expect the RAM usage of the Python process
> to balloon absurdly.

The other big reason to consider allowing khash (or some other hash
implementation) within numpy is that you can use it without the GIL.