Solana activated 200-millisecond slots on mainnet on Oct. 9, cutting its target slot time in half from the original 400-millisecond configuration and completing the SIMD-0525 upgrade that developer Anza confirmed hours after activation, according to .
TL;DR Solana is preparing to cut its slot time from 250ms to 200ms at the epoch 1053 boundary Friday, completing a reduction from 400ms ... Shorter slots also reduce how long a validator controls transaction ordering.