SIMD-0525-4
Slot Time → 200ms
Slot time step 4 of 4: the 200ms target — halving block times from where the year started.
Slot Time → 200ms is active on Solana mainnet since epoch 1052 — activated 13 days ago.
- mainnet
- active since epoch 1052 · 13 days ago
- testnet
- active since epoch 1006 · ≈ 2 months ago
- devnet
- active since epoch 1128 · ≈ 8 weeks ago
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The full guideWhat breaks, what to check, and how to prepare →How we know
Solana ships protocol changes behind on-chain switches called feature gates. This page reads the switch itself about every minute — once an activation is requested, it completes at the next epoch boundary, which is where the countdown comes from. No announcements, no invented dates.