TREE NEWS update: Zcash activated its NU7 upgrade on the public testnet at block 4,465,026 on Oct. 4, two days ahead of schedule, opening a trial run for 25-second block times. Developers now have roughly two weeks of testnet data before setting a mainnet activation height on Oct. 20.
Zcash Activates NU7 on Public Testnet, Trials 25-Second Blocks
The significance is procedural rather than headline-grabbing: NU7 is being exercised on testnet before any mainnet commitment, and the two-week data window is the real decision point. Faster blocks touch the whole network — miners, node operators and any service relying on confirmation timing — so the testnet run is where edge cases surface. Whether the observed data supports a mainnet height on Oct. 20 is the open question, and the scheduled date itself could slip.
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