The migration to Ethereum Layer 2 reduced Celo’s block times from five seconds to one second

Quotes that support claims

With this migration, Celo has gained native Ethereum bridging, and its block times have been reduced from 5 seconds to 1 second.

Thanks to the OP Stack framework, the new Celo L2 has decreased its block times from 5 seconds to 1 second. The L2 network benefits from Ethereum’s security and Optimism’s speed.