Perf: Poseidon2 GKR circuit #628
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ivokub
approved these changes
Feb 12, 2025
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Poseidon2 has an SBox of degree 17. Just like how it is more efficient to compute
x^17as(x^4)^4 x, with 7 multiplications instead of 16, it is more efficient (in terms of verifier constraints) to construct the circuit using three gates of degrees 1, 4, and 5, instead of one gate of degree 17.Doing
x^2^2^2^2 xgot a worse experimental result.