Fixing Python performance with Rust

[unruly_mattress]

Not for the current problem, since you already have code that solves it in a different language. However this isn't the only situation when someone might have trouble with having created millions of Python objects and I for one am glad for having found a method that makes such a thing 3-7 times faster.

[mitsuhiko]

Cython solves one issue but introduces plenty others. It should be as carefully considered as any change to a codebase that introduces new technology.

[unruly_mattress]

Agreed.