Performance is the worst argument you could choose. a) There's hardly an application where hash-performance matters. These things are fast. b) For precisely t

Performance is the worst argument you could choose. a) There's hardly an application where hash-performance matters. These things are fast. b) For precisely that reason that people may still complain about performance cryptographers invented a hash function that is faster than all the old choices like md5/sha1 and still secure (it's called blake2).