I mean: 1) if you cache your hashes, 2) they have the 'right' properties to
provide enough collision resistance that statistically speaking, there's no need
to worry about dupes, then it can make sense to compare hashes for a value
comparison. But for that to be true, your hash function has to output at least
128 bits, and either be cryptographic, or else you have to be willing to assume
people can intentionally force collisions, and then you should still be using
something off the shelf like xxh-128