# Xuejie Xiao - A Journey Optimizing CKB Smart Contract (Highlights)  ## Highlights - If more performance boost is really necessary, say you need 5x or 10x of the current performance, the only viable path IMHO, would be a major rewrite, either from the algorithmpoint of view, or froman architecture point of view. ([View Highlight](https://read.readwise.io/read/01gyhee0g1c2gvw1wq1g6c9vq8)) ^512574497 - If you have looked at the MMR C verifier code carefully, you might noticed that instead of a vector of proof items, the C verifier leverages a serialized buffer of proof data, then reads out commands from the proof data much like a small interpreter. This is due to the observation that MMR proof verification is nothing but a series of hash functions applied to designated values at certain order. ([View Highlight](https://read.readwise.io/read/01gyhee8x9827nhp4f8sdnxc6a)) ^512574503 - Somewhat ~470000 cycles are wasted initialization blake2b hasher, while in fact we are only using one type of blake2b hasher in the verifier. So the idea is: what if we can make the blake2b hasher constant, so all we need to do is initializing it once, not initializing it again and again? ([View Highlight](https://read.readwise.io/read/01gyheen4f74b6v0h4gdrxcwrk)) ^512574508