Here's a pybench comparison, on OS X 10.5/Core 2 Duo/gcc 4.0.1 (32-bit
non-debug build of the py3k branch). I got this by doing:
[create clean build of py3k branch]
dickinsm$ ./python.exe Tools/pybench/pybench.py -f bench_unpatched
[apply 30bit patch and rebuild]
dickinsm$ ./python.exe Tools/pybench/pybench.py -c bench_unpatched
Highlights: SimpleLongArithmetic: around 10% faster.
SimpleComplexArithmetic: around 16% slower!
CompareFloatsIntegers: around 20% slower.
I'll investigate the slowdowns.