On Wed, 2016-12-21 at 10:55 -0500, George Spelvin wrote: > Actually, DJB just made a very relevant suggestion. > > As I've mentioned, the 32-bit performance problems are an x86- > specific > problem. ARM does very well, and other processors aren't bad at all. > > SipHash fits very nicely (and runs very fast) in the MMX registers. > > They're 64 bits, and there are 8 of them, so the integer registers > can > be reserved for pointers and loop counters and all that. And there's > reference code available. > > How much does kernel_fpu_begin()/kernel_fpu_end() cost? Those can be very expensive. Almost certainly not worth it for small amounts of data. -- All Rights Reversed.
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