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Solana cuts mainnet slot time to 350 milliseconds toward 200 ms goal

Solana said shorter slots are meant to reduce confirmation and finalization latency, and it also shortened epoch time to about 42 hours from roughly 48 hours.

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Solana completed a mainnet upgrade that reduces the network’s target slot time to 350 milliseconds, down from 400 milliseconds, in the first step of a plan to reach 200 milliseconds, according to The Block.

The change aims to speed transaction confirmations by lowering the wall clock time of consensus and commitment thresholds measured in slots. Solana also shortened its epochs, with each epoch still containing 432,000 slots, bringing the expected duration to about 42 hours from about 48 hours.

The upgrade brief described further staged cuts of 50 milliseconds until the 200-millisecond final target is reached, with each stage enabled separately. It also noted the rollout can be paused if too many validators fail to produce blocks in their assigned slots.

Solana Foundation upgrade materials also indicate validators will change turns every 1.4 seconds, down from 1.6 seconds. In a point-in-time check cited by The Block, a 1,000-slot period shortly before the change took 415 seconds versus 368 seconds for a comparable period later in epoch 1020, and the outlet added the update is not designed to increase overall throughput.

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