TechFlow reports that on May 18, Anza, Solana’s core development team, recommended that Solana mainnet validators upgrade to Agave 4.0. This update includes XDP for Turbine, TPU transaction ingestion exclusively over QUIC, faster replay stages, and a suite of feature gates—such as SIMD—that will be activated during this cycle. Notably, production environment results from large mainnet validators show Turbine retransmission latency has dropped from 600 ms to approximately 0.8 ms.
Additionally, UDP-based transaction ingestion has been removed, making QUIC the sole transaction submission method; simple vote transactions now adopt the same cost model as regular transactions. Features including p-token support, Stake Program v5, SBPFv3 program support, pre-funded account creation, and BLS12-381 system calls will also be enabled during the 4.0 cycle.
