Ethereum Dev Proposes Halving Slot Times to 6 Seconds

Published on June 24, 2025

Core developer Barnabé Monnot has introduced EIP‑7782, which aims to halve Ethereum’s block (slot) time from 12 seconds to 6 seconds. This change is proposed for the “Glamsterdam” upgrade expected in late 2026eblockmedia.com+15cointelegraph.com+15unlock-bc.com+15.

🧩 Key Benefits

Faster confirmations: Blocks would be produced twice as fast, reducing transaction delays and enhancing user experience cointelegraph.com+8cointelegraph.com+8unlock-bc.com+8.

Improved DeFi dynamics: Benefits include more frequent price updates, tighter arbitrage windows, lower trading fees, and higher liquidity coindesk.com.

Enhances decentralization: More frequent blocks make it harder for any actor to censor transactionscointelegraph.com+1aicoin.com+1.

⚠️ Potential Trade-offs

Validators with slower connections may struggle under tighter deadlinesfxleaders.com+4cointelegraph.com+4coindesk.com+4.

Increased bandwidth usage due to more consensus messages could lead to congestion at peak times .

Extensive testing is needed to prevent instability and smart-contract issues unlock-bc.com+2cointelegraph.com+2aicoin.com+2.

🔧 Technical Adjustments

Block proposal window: from 4 s → 3 s

Attestation time: from 4 s → 1.5 s

Aggregation time: from 4 s → 1.5 s
This totals the proposed 6-second slot time unlock-bc.com+1aicoin.com+1cointelegraph.com+13cointelegraph.com+13fxleaders.com+13.

🔭 Outlook

Monnot believes that with “healthy scaling” completed by 2026 — including a tripled gas limit and expanded data blob capacity — EIP‑7782 could significantly improve Ethereum’s service value as a settlement layerfxleaders.com+15cointelegraph.com+15unlock-bc.com+15.