Glibc change exposing bugs

Here's my benchmark on Core 2. The Core 2 implementation in glibc-2.12.1 is *forward* (not reverse like on Nehalem, I don't know which way it is on Atom), and the performance difference between glibc and Linus' implementation goes both ways.

http://www.reddit.com/r/programming/comments/e4bq0/glibc_...