The Sui blockchain has rolled out a significant upgrade to its consensus engine, aimed at reducing transaction latency and improving efficiency without altering the network’s base architecture.
The new system, dubbed Mysticeti v2, was announced by Mysten Labs engineers and integrates transaction validation directly into the consensus process — streamlining how transactions move through the network.
Key Improvements
Mysticeti, first launched on Sui’s mainnet in July 2024, uses a DAG-based consensus model built for low latency and high responsiveness. The first version separated validation and consensus, which improved control but added computational overhead.
Mysticeti v2 removes that separation, allowing validation and consensus to happen simultaneously. The result is faster confirmation times and reduced load for complex transactions — bringing performance closer to the network’s original design goals of parallel processing at scale.
A Smarter Way to Submit Transactions
Sui has also introduced a new Transaction Driver to replace the old Quorum Driver system.
Previously, every transaction had to be sent to all validators, requiring multiple rounds of signature aggregation.
The new system sends each transaction to a single validator, which then coordinates certification across the network. Signatures are now batched inside consensus blocks, cutting bandwidth and CPU usage significantly.
Early testing by Mysten Labs showed noticeable latency reductions, particularly across Asia and Europe. With the release of node version 1.60, Mysticeti v2 and the Transaction Driver will become the default configuration on the network.
Next Steps
Mysten Labs said upcoming development will target fewer message rounds for transaction finalization, more direct consensus block streaming to full nodes, and fixes for “deadlock” conditions in certain execution patterns.
The upgrades are part of Sui’s broader strategy to deliver faster, more scalable blockchain performance while maintaining its ownership-based execution model.
