On Mon, Dec 1, 2014 at 12:35 PM, Austin S Hemmelgarn <ahferro...@gmail.com> wrote: > My only reasoning is that with this set of hashes (crc32c, adler32, and > md5), the statistical likely-hood of running into a hash collision with more > than one of them at a time is infinitesimally small compared to the > likely-hood of any one of them having a collision (or even compared to > something ridiculous like the probability of being killed by a meteor > strike), and the combination is faster on most systems that I have tried > than many 256-bit crypto hashes.
I have not seen any evidence that combining hashes like that actually reduces the chances of collision, but if we assume it does, then again, the non-crypto hashes would be faster. For example, 128-bit Spooky2 combined with 128-bit CityHash would produce a 256-bit hash and would be faster than MD5 + whatever. -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
