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Solana queues 300ms testnet slot times after stable 350ms phase

Solana queues 300ms testnet slot times after stable 350ms phase

Anza expects the next SIMD-0525 testnet step by Monday, August 10, while the 350ms mainnet rollout remains targeted for August 17 under Agave v4.2.

SOL

Fact Check
Every element of the claim is corroborated by primary and independent sources. Official Solana documentation (Agave 4.2 Release Overview and Reduced Slot Times) confirms SIMD-0525's four 50ms decrements from 400ms to 200ms (via 350, 300, 250) and mainnet feature activations starting the week of August 17, 2026. Solana Compass and CryptoBriefing both report the August 5, 2026 testnet activation of the first step (400ms to 350ms). Brennan Watt of Anza confirmed the activation timing on X. There is no conflicting evidence.
Summary

Solana has queued 300-millisecond slot times on testnet after sustaining eight consecutive hours at 350ms, pushing SIMD-0525 into its second test phase before the first cut reaches mainnet. Anza CEO Brennan Watt said 300ms activation is expected by Monday, August 10, while the 350ms mainnet step remains targeted for August 17 via Agave v4.2. SIMD-0525 lowers slot time from 400ms to a 200ms goal in four sequential stages controlled by feature gates, with a one-epoch delay before each change takes effect and progression dependent on acceptable block skip rates. Solana Foundation documentation says shorter slots are intended to speed transaction confirmation, tighten market-maker spreads, and give validators shorter epochs and faster reward cycles, while per-slot compute budgets scale with each reduction.

Terms & Concepts
  • slot time: The target interval between block production opportunities on a blockchain network.
  • feature gate: An activation mechanism that lets validators turn on a protocol change after enough stake votes support it.
  • block skip rate: A measure of how often scheduled blocks are missed, used as a network health check during upgrades.