[issue4258] Use 30-bit digits instead of 15-bit digits for Python integers.

[Pernici Mario]

Pernici Mario <pernici at users.sourceforge.net> added the comment:

The attached patch uses mul1 in long_mul in the version patched with
30bit_longdigit13+optimizations.patch

Comparison between these two patches on hp pavilion Q8200 2.33GHz

pybench                  patch   new patch
SimpleIntegerArithmetic  89      85
other tests equal

pidigits_noprint 2000   998      947

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nosy: +pernici
Added file: http://bugs.python.org/file13137/30bit_longdigit13+optimizations1.patch

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