On Wed, May 07, 2014 at 06:56:29PM +0800, Liu Bo wrote: > "xxHash is an extremely fast non-cryptographic Hash algorithm, working at speeds > close to RAM limits."[1] And xxhash is 32-bits hash, same as crc32. > > Here is the hash comparsion extracted from the link[1]: > (single thread, Windows Seven 32 bits, using Open Source's SMHasher on a Core 2 > Duo @3GHz) > > -------------------------------------------- > Name Speed Q.Score Author > xxHash 5.4 GB/s 10 > CRC32 0.43 GB/s 9 > -------------------------------------------- Core 2 Duo is awfully old CPU. Since 2008, Intel CPUs have crc32 instruction, hugely speeding up CRC operations. -- Tomasz Torcz "God, root, what's the difference?" xmpp: zdzichubg@xxxxxxxxx "God is more forgiving." -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
