the match object.  Based on patch by WGH.

the match object.  Based on patch by WGH.

the match object.  Based on patch by WGH.

Patch by Chi Hsuan Yen.

Decreased density gives better collision statistics (average of 2.5 probes in a
full table versus 3.0 previously) and fewer occurences of starting a second
possibly overlapping sequence of 10 linear probes.  Makes resizes a little more
frequent but each with less work (fewer insertions and fewer collisions).

Based on patch by Georg Brandl.

Original patch by Georg Brandl.

using PySlice_GetIndicesEx() in debug builds.

using PySlice_GetIndicesEx() in debug builds.

using PySlice_GetIndicesEx() in debug builds.

Patch by Jelle Zijlstra.

Patch by Jelle Zijlstra.

Calling builtin method is at most 10% faster.

* so->used never gets changed during a resize
* so->filled only changes when dummies are present and being eliminated

(10-20% for small integers).