Solana speeds up blocks by 17%, but transaction capacity stays the same

Solana cut its target slot time from 300 milliseconds to 250 milliseconds earlier Friday, blockchain data shows, making the network’s clock run nearly 17% faster without producing an equivalent increase in total transaction capacity.

A slot is the short window in which a designated validator can add a block. At 250 milliseconds, Solana will target four slots each second, up from about 3.3, giving wallets, exchanges and trading applications a more current view of the network.

Validators, or entities that supply computing power to maintain any blockchain network, will remain leaders for four consecutive slots. The faster clock therefore reduces each leader’s control window from 1.2 seconds to one second, handing transaction-ordering power to the next validator sooner.

That matters for applications such as oracle-powered markets and automated market makers, where stale prices or a few hundred milliseconds of uncertainty can affect whether a transaction executes as intended.

Users should see transaction updates sooner, while swaps have a smaller window in which the market can move before they reach the network. That can mean fewer failed trades and less chance of receiving a materially different price than expected.