Very interesting! With the EXACT same code as Ikegami, (with the (a)* mod), I get:
Rate regex split unpack_C unpack_a
regex 3.00/s -- -3% -9% -19%
split 3.09/s 3% -- -6% -17%
unpack_C 3.29/s 10% 7% -- -11%
unpack_a 3.71/s 24% 20% 13% --
I have seen before that the Ikegami machine is faster than mine on certain benchmarks. But, I am unable to understand how split() can be the fastest. I am running a Prescott processor, an old 3 Ghz hyper-threaded critter. With Active State Perl 5.10.1.
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