[nilobject]

I thought the title meant it was using Altivec or SSE, but it's merely operating on a chunk of 4 bytes at a time dealing with misaligned data up front. Still a good article, despite my initial disappointment.

A similar article which originally taught me these tenants is:

http://rentzsch.com/papers/straightenUpAndFlyRight

[cperciva]

it's merely operating on a chunk of 4 bytes at a time

If you have a modern CPU, that code operates on 8 bytes at a time. :-)