Ethereum Developers Experiment with 4x Gas Limit Boost for Fusaka Hard Fork

Ethereum core developers are testing a drastic boost in layer 1 gas limit as part of the future Fusaka hard fork, after the upcoming to-be-deployed Pectra upgrade.

EIP-9678 Suggests Increasing Gas Limit to 150 Million

As per Ethereum Improvement Proposal (EIP) 9678, filed on April 23 by Sophia Gold from the protocol support team of the Ethereum Foundation, developers are recommending a quadrupling of the Ethereum gas limit, taking it to 150 million.

In the recent All Core Devs Execution (ACDE) session, Ethereum developer Tim Beiko assured that the proposal to include the gas limit increase as one of the core features of Fusaka is finding favor.

"To coordinate on client defaults and maintain this as a priority, we've authored an EIP," Beiko said in an April 24 update. "It's somewhat unorthodox, but not unheard of (see EIP-7840). We intend to have it merged soon next week and proceed to SFI it on the following ACDE."

As the developers continue exploring the effects of this rise, they anticipate finding protocol-level modifications necessary to accommodate a greater gas limit. These modifications can lead to further EIPs being proposed before Fusaka is completed.

Fusaka May Roll Out in Late 2025

While Pectra will go live on the mainnet in May 2025, the Fusaka hard fork is planned tentatively for late 2025.

The pressure to raise the gas limit is only one aspect of a larger endeavor to scale execution on layer 1 more cost-effectively. The action comes with some danger, though, as developers indicate there are existing client bugs waiting to surface with higher gas limits than those run on the mainnet.

This will take client developers' time both to test and to debug any bugs that develop, so it is reasonable to add [the proposal] as an EIP in a hard fork," Beiko explained.

He also explained that although validators ultimately decide on the gas limit, adding an EIP would align client defaults and keep the initiative a priority across the network.

Current Gas Limit Trends

The mean Ethereum gas limit was approximately 30 million after an August 2021 boost, according to data provided by Ycharts. More recently, validators approved a subsequent increase on February 4, taking the gas limit to slightly below 36 million, where it has hovered ever since.

If brought into effect, the suggested 150 million gas limit would be a record leap—increasing throughput and potentially reducing transaction fees on the Ethereum network, subject to block utilization and demand.

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