Serhiy Storchaka added the comment:

> can you please attach the generated assembly code for the siphash function 
> with your compiler and your optimization flags (that is, the one that 
> produces the above results)?

GCC (Ubuntu 4.4.3-4ubuntu5.1) options:

-pthread -c -Wno-unused-result -DNDEBUG -g -fwrapv -O3 -Wall 
-Wstrict-prototypes   -I. -IInclude -I./Include    -DPy_BUILD_CORE

32-bit Linux on AMD Athlon(tm) 64 X2 Dual Core Processor 4600+.

Added file:

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