[issue4753] Faster opcode dispatch on gcc

[Antoine Pitrou]

Antoine Pitrou <pitrou at free.fr> added the comment:

> @pitrou:
> > The machine I got the 15% speedup on is in 64-bit mode with gcc
> 4.3.2.
> 
> Which is the processor? I guess the bigger speedups should be on 
> Pentium4, since it has the bigger mispredict penalties.

Athlon X2 3600+.

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<http://bugs.python.org/issue4753>
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