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The Right Way to Hash a Merkle Tree

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The Right Way to Hash a Merkle Tree

Duration: 00:23:46

Speaker: Potuz

Type: Talk

Expertise: Advanced

Event: Devcon 6

Date: Oct 2022

We shill an assembly SHA256 library that is optimized to compute the hash tree root of a Merkle tree. It consists of reusing two publicly available methods: 1. Hardcoding padding block. This method is used in Bitcoin's core client hashing algo. 2. Use CPU-vectorization to hash different branches in parallell. This is Intel's "multi-buffer" method. Initial benchmarks show up to 1200% improvement on hashing of large lists on AVX512. A GoAssembly version is used by prysm.
About the speakers



I am a professional mathematician that temporarily happen to be a core developer at prysmaticlabs. I enjoy the types of puzzles that arise when trying to hack the protocol.

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