Base to Activate 200ms Blocks With Denim Upgrade on Nov 5

buildonbase says the network will move to 200ms block times with its Denim upgrade on November 5, a change the team is flagging to developers ahead of activation. Base lead jessepollak amplified the announcement on October 29, pushing the builder guidance to his own followers.

The original post directs anyone building on Base to three considerations to review before Denim goes live, with the full details carried in a linked thread rather than in the post itself. Base framed the notice as pre-activation prep for developers rather than a general user announcement.

Base is Coinbase's Ethereum Layer-2 network, built on the OP Stack and led by Pollak. It has no native token; transactions are paid in ETH. Faster block times reduce the interval between blocks produced on the network, a parameter that matters most to teams whose contracts, bots, or infrastructure assume a particular cadence for state updates and transaction inclusion.

What to watch for

Builders have until November 5 to work through the three items Base flagged. Expect follow-up detail from the buildonbase account on how Denim's parameters affect deployed contracts as activation approaches.