# Live on Unichain: Flashblocks 200ms Sub-Blocks (/docs/changelog/completed-notifications/live-on-unichain-flashblocks-200ms-sub-blocks)

Posted: August 14, 2025 | Effective: August 14, 2025

Unichain now confirms transactions every 200 milliseconds, making it one of the fastest chains available.

This makes Unichain the first chain to pair sub-second latency with provable ordering, delivering the speed users expect and integrity developers can build on.

> [!NOTE]
> Flashblocks on Unichain were designed by Uniswap Labs and Flashbots to run inside Trusted Execution Environments (TEEs).

> [!NOTE]
> Learn more about [Flashblocks](https://blog.uniswap.org/flashblocks-are-live) and stay updated with the latest [Unichain developments](https://x.com/unichain/status/1955978120269312280).