MurmurHash 2.0

The name of the project tells you what it does. If you don't understand from the name of the project, you'll certainly have no use for it.

Come on, there's even a Wikipedia page for it: http://en.wikipedia.org/wiki/MurmurHash

I just ported it to Java. It took me five minutes.

It's 40 lines of C++, most of which are of the `k *= m;` variety. You literally paste in the C++, fix the type declarations, and replace the point increment looping with standard indexed array iteration. Remember to replace `const` with `final` and you're done.

Using JNI for a high-speed hash function makes only slightly more sense than putting a SOAP interface on it.

I doubt the Pentium 4 had no barrel shifter, as its shift instructions have single-cycle latency. It does seem, however, that the Prescott can do rotate instructions in one cycle while the Northwood took 4 (thanks, Mubench!).