> For the complete documentation index, see [llms.txt](https://v2tech.noahlabs.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://v2tech.noahlabs.io/6.noah-chain-4.0-the-ultimate-performance-of-heterogeneous-public-chains.md).

# 6.Noah Chain 4.0: The Ultimate Performance of Heterogeneous Public Chains

- [6.1 Rationale: Why Heterogeneous Dual Engine](https://v2tech.noahlabs.io/6.noah-chain-4.0-the-ultimate-performance-of-heterogeneous-public-chains/6.1-rationale-why-heterogeneous-dual-engine.md)
- [6.1.1 The Ark-Engine EVM optimization](https://v2tech.noahlabs.io/6.noah-chain-4.0-the-ultimate-performance-of-heterogeneous-public-chains/6.1-rationale-why-heterogeneous-dual-engine/6.1.1-the-ark-engine-evm-optimization.md)
- [6.1.2 IPFS Memory-Bank: Data Persistence Protocol](https://v2tech.noahlabs.io/6.noah-chain-4.0-the-ultimate-performance-of-heterogeneous-public-chains/6.1-rationale-why-heterogeneous-dual-engine/6.1.2-ipfs-memory-bank-data-persistence-protocol.md)
- [6.2 Future Consensus Algorithm: Proof-of-Symbiosis (PoSyb) Concept](https://v2tech.noahlabs.io/6.noah-chain-4.0-the-ultimate-performance-of-heterogeneous-public-chains/6.2-future-consensus-algorithm-proof-of-symbiosis-posyb-concept.md)