Jeroen Demeyer <j.deme...@ugent.be> added the comment:
> 100% pure SeaHash does x ^= t at the start first, instead of `t ^ (t << 1)`
> on the RHS.
Indeed. Some initial testing shows that this kind of "input mangling" (applying
such a permutation on the inputs) actually plays a much more important role to
avoid collisions than the SeaHash operation x ^= ((x >> 16) >> (x >> 29)).
So my suggestion remains
for y in INPUT:
t = hash(y)
t ^= t * SOME_LARGE_EVEN_NUMBER
h ^= t
h *= MULTIPLIER
Adding in the additional SeaHash operations
x ^= ((x >> 16) >> (x >> 29))
x *= MULTIPLIER
does not increase the probability of the tests passing.
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue34751>
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