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ASICs use many threads to compute SHA256 hash functions in parallel. At the time of this post, Antminer S19 can compute 110TH/s. How many SHA256 hash functions per thread can the best SHA256 ASIC compute?

I would like to know the maximum number of iterative hashes per second, i.e., SHA256^N(s) = SHA256(SHA256(....(SHA256(s)))) that can be computed on the best hardware.

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    There's no "threads" in an ASIC, and bitcoin miners don't compute SHA256 at all, they do partial fragments of the end of one, and the start of another, never the whole thing.
    – Claris
    Oct 8, 2021 at 22:03
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    Also Bitcoin mining does not involve iterated hashing, so ASICs are almost certainly incapable of that.
    – Pieter Wuille
    Oct 9, 2021 at 0:03

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