According to Wu, Max Resnick, Chief Economist of Solana ecosystem development company Anza, has submitted the Solana Improvement Proposal (SIMD-0301): Asynchronous Execution. This proposal introduces asynchronous execution to eliminate the replay bottleneck in the consensus critical path (i.e., the process in which validators must re-execute transactions within a block). Compared to the traditional synchronous execution model where validators must wait for transaction replay to complete before voting, SIMD-0301 allows validators to vote even before the block execution, thereby significantly reducing confirmation delays under the Alpenglow consensus mechanism and supporting Multi-Leader Concurrency (MCL) and pipelined consensus. Currently, this proposal is still in the draft stage and must meet several prerequisites to be activated, with plans for formal implementation after the new Alpenglow consensus mechanism is enabled.
