According to @AveryChing, Aptos mainnet has achieved sub-100ms block times on a decentralized L1, presented as a first for web3; source: X post by @AveryChing on Aug 20, 2025: https://twitter.com/AveryChing/status/1958274817968443492. The post did not include benchmarking methodology or validator metrics beyond the headline claim; source: X post by @AveryChing on Aug 20, 2025: https://twitter.com/AveryChing/status/1958274817968443492.