Uniswap has activated a new feature called Flashblocks on its Unichain layer-2 network, cutting transaction pre-confirmation times to about 200 milliseconds. The upgrade, announced on 14 August, is already live on the Uniswap web app and wallet, allowing users to see trades locked in almost as quickly as they press “Swap.” Flashblocks relies on the OP Stack, the open-source software developed by Optimism, which underpins several emerging Ethereum scaling projects. Third-party trading venue Matcha said it has also integrated the feature, extending the faster settlement to its own interface. The rollout is aimed at giving decentralized-finance traders near-instant feedback comparable to centralized exchanges, while keeping transactions settled on Ethereum. Uniswap did not disclose performance targets beyond the 200 millisecond benchmark or provide details on future throughput expansions.