Ethereum's 'Glamsterdam' Upgrade Enters Final Testing, Targeting 10,000 TPS and 78% Fee Reduction

The Ethereum Foundation has officially moved its highly anticipated "Glamsterdam" protocol upgrade into the final stages of development, marking a critical milestone for the world's largest smart contract platform. Core developers confirmed this week that dedicated devnets are now live, actively testing a finalized suite of Ethereum Improvement Proposals (EIPs) that will fundamentally overhaul how the network processes transactions. The upgrade, which combines the "Gloas" consensus-layer and "Amsterdam" execution-layer changes, represents the most significant architectural shift for Ethereum since its transition to Proof-of-Stake in 2022. By restructuring block production at the base layer, Glamsterdam aims to solve the persistent bottlenecks that have historically plagued the network during periods of high demand.[1][2]

While the upgrade was initially slated for an early summer release, developers have officially pushed the target mainnet activation to the third quarter of 2026. This slight delay accommodates an ambitious new technical milestone: establishing a 200-million gas limit floor for the post-upgrade network. The gas limit dictates the maximum amount of computational effort allowed in a single block, effectively serving as the speed limit for the entire blockchain. Hitting this target requires extensive cross-client testing to ensure that the network remains stable and secure under unprecedented transaction loads, prompting the Foundation to prioritize rigorous devnet validation over a rushed deployment.[1][5]

The leap to a 200-million gas limit represents a massive expansion of Ethereum's capacity, up from the current ceiling of approximately 60 million. By combining this expanded block size with new methods for parallel transaction processing, Glamsterdam is designed to push Ethereum's base-layer throughput toward an ambitious target of 10,000 transactions per second. For years, critics have pointed to Ethereum's sluggish base-layer speed—often hovering around 15 to 30 transactions per second—as its primary weakness compared to newer, high-speed alternatives. This upgrade directly addresses that vulnerability, equipping the mainnet to handle global-scale financial activity without buckling under the weight of its own success.[8]

For everyday users, the most tangible impact of this massive capacity increase will be felt directly in their wallets. A specialized package of gas repricing changes, notably EIP-7904, is projected to slash Layer 1 transaction fees by approximately 78.6 percent. This marks a strategic pivot for the Ethereum ecosystem, which has spent the last several years relying almost entirely on secondary Layer 2 networks to keep costs manageable for retail users. By drastically lowering the cost of executing smart contracts on the base layer, Glamsterdam aims to make mainnet transactions financially viable again for decentralized finance protocols, NFT creators, and everyday senders.[8]

This renewed focus on Layer 1 efficiency comes at a time when Layer 2 networks have already achieved remarkable cost reductions. Following the Dencun upgrade in 2024 and the Fusaka upgrade in late 2025, transaction fees on prominent rollups like Arbitrum and Base plummeted to an average of just $0.01. However, the proliferation of these secondary networks introduced new complexities, forcing users to navigate fragmented liquidity pools and rely on vulnerable cross-chain bridges. Glamsterdam's core objective is to shift the scaling narrative back toward a high-performance Layer 1, allowing users to enjoy the uncompromising security of the mainnet without the prohibitive costs that previously drove them away.[5][7]

Under the hood, the upgrade's headline feature is Enshrined Proposer-Builder Separation, formally known as EIP-7732. Currently, Ethereum validators rely heavily on external, off-chain relays to construct the blocks of transactions they propose to the network. This reliance on third-party infrastructure has created potential centralization bottlenecks and introduced uncomfortable trust assumptions into a system designed to be trustless. By moving the coordination between block builders and block proposers directly into the Ethereum protocol itself, ePBS eliminates the need for these external relays, fortifying the network's decentralized architecture.[3][6]

The implementation of ePBS also serves as a powerful defense mechanism against Maximum Extractable Value abuse, a practice where sophisticated trading bots front-run or reorder everyday users' transactions to siphon off hidden profits. Under the new protocol rules, block producers will encrypt and submit their block content, while proposers simply select the block offering the highest reward without seeing the underlying transactions. Because the transaction details remain hidden until the block is officially confirmed, malicious actors lose the visibility required to manipulate the order of trades, resulting in a fairer and more equitable execution environment for all participants.[3][8]

Working in tandem with ePBS, Glamsterdam introduces Block-Level Access Lists via EIP-7928. In Ethereum's current design, the network discovers which accounts and smart contracts a transaction will interact with only as the transaction is actively being executed. This reactive approach forces the network to process transactions sequentially to avoid conflicts. The new access lists require blocks to declare all of their state dependencies upfront, providing the network with a clear map of exactly which data will be touched before any computation begins.[4][6]

By mapping these dependencies in advance, Ethereum clients can easily identify transactions that do not overlap and process them simultaneously—a breakthrough known as parallel execution. This is the same underlying technology that allowed alternative blockchains like Solana to achieve their massive throughput numbers. Bringing parallel execution to Ethereum represents a monumental architectural milestone, allowing the network to fully utilize modern multi-core processors and drastically reducing the time it takes for nodes to sync and verify the blockchain's state.[4][6]

To prevent the network's permanent database from bloating uncontrollably under these higher gas limits, developers have also finalized EIP-8037. This proposal introduces a smarter, more sustainable pricing model for data storage by tying state creation fees directly to the actual size of the data being permanently written to the blockchain. By making it more expensive to bloat the network's state, the protocol financially incentivizes developers to write leaner, more efficient smart contracts, ensuring that the hardware requirements for running an independent Ethereum node remain accessible to everyday enthusiasts.[1]

The market has reacted positively to the stabilization of the Glamsterdam roadmap, viewing the upgrade as a major catalyst for the ecosystem. Capital inflows into Ethereum-based assets have steadily increased as institutional investors and decentralized finance protocols position themselves for the network's hyper-scaling era. Analysts note that the combination of rock-bottom fees and massive throughput could trigger a renaissance in on-chain activity, drawing developers who had previously migrated to cheaper alternative chains back to the Ethereum mainnet.[2][9]

Despite the widespread optimism, the transition requires careful coordination across the entire ecosystem. Node operators, staking providers, and infrastructure teams will be required to update both their consensus and execution clients simultaneously before the mainnet activation. Because Glamsterdam alters the fundamental mechanics of how blocks are built and verified, failing to update software in time would result in nodes falling out of sync with the network, making this one of the most operationally demanding upgrades since The Merge.[4][5]

Even as Glamsterdam enters its final testing phases, the Ethereum Foundation is already scoping its next major evolutionary leap. Dubbed "Hegotá," the subsequent upgrade will focus on introducing Verkle Trees and stateless clients, further reducing the hardware burden on node operators. But for the immediate future, all eyes remain fixed on the Q3 2026 activation of Glamsterdam, as developers race to deliver the foundational infrastructure that could finally solve the blockchain trilemma of achieving scalability, security, and decentralization all at once.[1][5]