ethlambda: how we got a 3x speedup in signature aggregation (opens in new tab)

Devnet 4 of the post-quantum leanConsensus testnet introduced recursive signature aggregation through leanMultisig. The change is good for the network (fewer proofs to verify per block), but it pushed enough work onto aggregators that our node started missing slots and slipping on finalization. Two changes got us back to parity: