With Agave 4.2, Solana’s core validator client continues to break new ground. The major release includes sevearl highly anticipated, feature-gated upgrades.
3.3× Larger Transactions with a new Transaction v1 standard
90% State Bond (Rent) Reduction
Reduced 200ms Slot Times
Alpenglow feature-complete
New Governance Tooling (SIMD related)
Preconfirmations (preconfs) are the earliest available signal that a transaction is about to land on Solana. A preconfirmation is emitted the moment a block leader executes a transaction, after the outcome is known locally and before it is recorded into an entry, shredded, and propagated across the network. Consuming preconfirmations allows developers to observe transactions one stage earlier than shred streams and several stages earlier than any RPC commitment level.

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