Key highlights:
- New PeerDAS tech boosts Ethereum’s data capacity up to 8x.
- Fusaka moves Ethereum closer to near-instant user experience.
- Traders expect stronger market reaction than the Pectra rally.
Ethereum has launched a major upgrade called Fusaka, which activated on the mainnet on December 3 at 23:49 CET at epoch 411,392. The update introduces PeerDAS (peer data availability sampling), a breakthrough technology designed to dramatically increase data throughput and reduce transaction fees across the network.
Fusaka is live on Ethereum mainnet!
– PeerDAS now unlocks 8x data throughput for rollups
– UX improvements via the R1 curve & pre-confirmatons
– Prep for scaling the L1 with gas limit increase & moreCommunity members will continue to monitor for issues over the next 24 hrs.
— Ethereum (@ethereum) December 3, 2025
The Ethereum Foundation shared a detailed analysis on X, outlining how the upgrade affects users, developers, node operators, layer-two teams, and enterprise applications.
According to the foundation, Fusaka brings Ethereum significantly closer to enabling near-instant transactions as processing speeds continue to improve.
The path toward instant transactions and cheaper rollups
The foundation explained the main benefits of the Fusaka upgrade:
“Fusaka lays the groundwork for “instant-feel” user experiences Based preconfirmations allow for reduced transaction latency—moving from minutes to milliseconds Combined with lower transaction costs, this opens the door for a new tier of usability.”
For Layer-2 networks and rollups, the upgrade marks one of the biggest efficiency gains in recent years. PeerDAS will provide up to 8x more data throughput, allowing rollups to scale more effectively without sacrificing decentralization.
How PeerDAS works
PeerDAS splits large rollup data blocks into smaller chunks, enabling nodes to download and verify far less information while maintaining network security.
This reduces the cost of rollup operations, speeds up data availability, and improves overall Layer-2 performance on Ethereum.
Lower fees, stronger scaling, and rising market expectations
“For rollups, this means cheaper blob fees and more room to grow, plus lower fees for users — all while preserving decentralization,” the Ethereum Foundation emphasized.
Traders have also taken notice. Market analyst MerlijnTrader highlighted that Ethereum’s previous major upgrade, Pectra, resulted in a 58% price surge, and he now expects Fusaka to trigger an even stronger market reaction.
Source: Merlijn The Trader via X
Bitcoin veteran @LLuciano_BTC offered similar thoughts to his 2 million followers, saying: “Fusaka feels even bigger, the kind of catalyst that sparks real upside. Fusaka hits on December 3rd and it’s one of those upgrades people talk about later.”
With Fusaka on the mainnet, Ethereum completes its second major upgrade of the year, bringing significant improvements to scalability and setting the stage for the next generation of decentralized applications and services.
Beyond the fundamental improvements brought by the Fusaka upgrade, another bullish catalyst for Ethereum has been Bitmine Immersion (BMNR), which is aggressively buying ETH with the goal of eventually holding 5% of its supply. The company recently bought 23,773 ETH in a period of just three days.
Source:: Ethereum’s New Fusaka Upgrade Brings Up to 8x More Data Capacity