Solana is set to lower its target slot time to 200 milliseconds on Friday, October 9, completing a staged series of four network upgrades that began in August. Developer Anza expects the change to take effect at epoch 1053, at around 15:00 UTC.

Five Block-Building Opportunities Per Second

The network currently targets 250 milliseconds per slot. Once the change is active, validators will have five opportunities each second to add transactions to blocks, up from 2.5 under the network's original 400-millisecond configuration. Because blocks become available twice as often, a transaction submitted at any moment encounters its next block-building opportunity sooner on average.

The rollout has proceeded in stages. Solana moved to 350-millisecond slots on August 21, then to 300 milliseconds on August 28, and to 250 milliseconds on September 18, with developers reviewing network performance between each stage. Under the new schedule, an epoch — which contains 432,000 slots — will last roughly one day.

Faster Updates, Unchanged Processing Capacity

Shorter slots allow wallets, exchanges, and trading services to update more frequently. Solana separately launched a settlement tool for institutional trades on October 6, enabling asset transfers and payments to settle together.

Under the SIMD-0525 proposal, each slot's computing limit falls from 37.5 million units to 30 million — compute units being the network's measure of processing work per block. The reduction keeps the network's theoretical processing capacity broadly unchanged even as blocks are produced more frequently.

Validators will continue to hold four consecutive slots for block building. Under the original schedule, that combined window spanned 1.6 seconds; at 200 milliseconds per slot, it drops to 800 milliseconds, shortening the period during which a single validator controls transaction ordering.

Increased Demands on Validators and Wallets

The timing change is distinct from Solana's Alpenglow project, which remains in testing and aims to shorten transaction finality — the measure of when the network confirms a transaction.

Faster slots require validators to vote more often. Operators voting on every slot could face roughly twice their previous voting costs, along with greater demands on their network connections. Blockhash validity also covers fewer seconds in real time, although its slot-based limits remain unchanged. Wallet users who approve transactions manually or sign them offline may need to submit them sooner.

Performance Under Review

Data from Solana Compass placed average slot times at 266 to 269 milliseconds against the current 250-millisecond target. Developers plan to track actual timing and missed blocks during the final stage to assess how the network performs after activation.

The final configuration already operates on Solana's testnet and devnet. Developers will monitor skipped blocks and slot times to determine whether mainnet sustains the new target.

Separately, Samsung's planned support for USDC transfers would add another wallet service to the network. Eligible Galaxy users in the United States could gain access later this month.

Source: CoinCentral