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Solana marries PoH with a modified version of Practical Byzantine Fault Tolerance (PBFT) called . In this system, validators vote on the state of the blockchain. Because PoH provides a trusted source of time, Tower BFT reduces latency and message overhead. Validators can "lock" their votes based on a synchronized clock, making the consensus process extremely fast and finality near-instant (approximately 400 milliseconds).
The world’s first parallel smart contracts runtime, allowing thousands of transactions to run simultaneously rather than one by one. Gulf Stream: