On Wed, May 7, 2014 at 1:50 PM, Darrick J. Wong <[email protected]> wrote: > Just for kicks I (sloppily) benchmarked a few of the kernel's hash > implementations on a Core i5-3320M CPU @3.3GHz: > xxhash: 6.0GB/s > crc32c-intel: 11.5GB/s > crc32c (no hw accel): 1.8GB/s
CRC also usually has the very mild data recovery advantage that if your error is just a bitflip you can correct it using the crc in a computationally efficient manner, potentially enabling fancy recovery tools... so it it were merely equal in speed you'd still probably prefer to use a CRC. -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
