Solana reduced its target block time from 300 to 250 milliseconds on September 18, 2026, coinciding with the start of epoch 1037. This fourth stage of SIMD-0525 brings block production to 4 slots per second, up from approximately 3.3 slots previously. The change does not affect raw transaction capacity since compute and data limits per slot were proportionally scaled down to maintain network stability. The improvement primarily targets data freshness, a critical factor for wallet and trading applications. The protocol’s final goal is to reach 200 milliseconds per slot.
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