Zcash developers have set Nov. 5 as the target date for activating the NU7 upgrade on mainnet, a change that would reduce the network’s target block interval from 75 seconds to 25 seconds.

The rollout is not final. A testnet activation is planned for Oct. 6, followed by a go-or-no-go checkpoint on Oct. 20 that could still push back the mainnet timetable if testing exposes serious problems.

A staged path to activation

The upgrade schedule includes two steps before any mainnet change takes effect. Developers first plan to activate NU7 on testnet on Oct. 6, giving the network a controlled environment to evaluate how the shorter block timing behaves in practice.

After that, Oct. 20 is expected to serve as the final decision point for mainnet. Only if results are satisfactory would the Nov. 5 target date remain in place. If important issues appear during testing, the activation can be delayed.

What ZIP 254 would change

The core protocol change in NU7 comes through ZIP 254, which would cut Zcash’s target block spacing by two-thirds. Instead of producing blocks roughly every 75 seconds, the network would aim for 25-second intervals.

For users, the most visible effect would likely be faster transaction inclusion on-chain. The adjustment changes the pace at which the chain is expected to advance, making it a significant consensus-level modification rather than a simple performance tweak.

Why shorter block times are more complex

Reducing the time between blocks is not only about making the chain feel faster. Nodes across the network must still be able to receive, propagate and validate new blocks quickly enough to stay synchronized with one another.

A shorter interval can improve responsiveness, but it can also place more demand on networking, storage and validation. That is why developers are treating the rollout cautiously and using a phased process instead of moving directly to mainnet.

What remains uncertain

NU7 is not yet live on the Zcash mainnet, and the Nov. 5 date should be understood as a target rather than a fixed outcome. Developers have left room to pause or delay the upgrade if the testnet phase uncovers serious concerns.

The next confirmed milestone is the Oct. 6 testnet activation. After that, the Oct. 20 checkpoint is expected to determine whether the network proceeds toward the planned Nov. 5 mainnet upgrade or waits for further work.

Source: bitcoinist.com