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Cardano's Leios Upgrade Hits 6x Throughput in Latest Testnet Milestone
28 Aug 2026, 05:05
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The 'Earth' phase testnet for Cardano's Leios scaling upgrade achieved six times mainnet throughput, alongside a new Bitcoin Lightning-style payment channel architecture entering pre-production.
<p>Cardano's long-anticipated Leios scaling upgrade cleared a significant milestone this week, with its "Earth" phase testnet achieving six times the throughput of Cardano's current mainnet -- one of the clearest technical signals yet that the upgrade could meaningfully expand the network's transaction capacity once deployed.</p>
<p>Leios is designed to overhaul how Cardano processes and finalizes blocks, moving away from aspects of the network's current architecture that have historically limited its throughput relative to some competing layer-1 blockchains. Achieving a 6x improvement in a testnet environment does not guarantee an identical gain once the upgrade reaches mainnet, where real-world network conditions, validator diversity and transaction complexity typically introduce additional constraints -- but it gives developers a strong proof point to build toward as the upgrade moves through further testing phases.</p>
<p>The throughput milestone landed alongside a separate announcement: a new state channel payment architecture, informally described as bringing Bitcoin Lightning Network-style functionality to Cardano, entered pre-production this week. The architecture is aimed at enabling fast, low-cost payments by settling the bulk of transaction activity off-chain through payment channels, only touching the base layer for opening and closing those channels -- a design pattern already proven at scale on Bitcoin's own Lightning Network.</p>
<p>Cardano also faces a near-term governance deadline separate from its technical roadmap: a vote to fill four seats on its Constitutional Committee closes September 1. The Constitutional Committee plays a central role in Cardano's on-chain governance system, reviewing and approving certain categories of governance actions, making the outcome of this vote consequential for how upcoming protocol decisions, including further steps in the Leios rollout, get approved going forward.</p>
<p>Together, the Leios throughput milestone, the new payment channel architecture, and the upcoming governance vote represent a busy stretch for Cardano's development roadmap. Whether the testnet gains translate into comparable real-world performance improvements once Leios reaches mainnet remains the key question the ecosystem will be watching as the upgrade progresses through its remaining development phases.</p>
<p>Leios is designed to overhaul how Cardano processes and finalizes blocks, moving away from aspects of the network's current architecture that have historically limited its throughput relative to some competing layer-1 blockchains. Achieving a 6x improvement in a testnet environment does not guarantee an identical gain once the upgrade reaches mainnet, where real-world network conditions, validator diversity and transaction complexity typically introduce additional constraints -- but it gives developers a strong proof point to build toward as the upgrade moves through further testing phases.</p>
<p>The throughput milestone landed alongside a separate announcement: a new state channel payment architecture, informally described as bringing Bitcoin Lightning Network-style functionality to Cardano, entered pre-production this week. The architecture is aimed at enabling fast, low-cost payments by settling the bulk of transaction activity off-chain through payment channels, only touching the base layer for opening and closing those channels -- a design pattern already proven at scale on Bitcoin's own Lightning Network.</p>
<p>Cardano also faces a near-term governance deadline separate from its technical roadmap: a vote to fill four seats on its Constitutional Committee closes September 1. The Constitutional Committee plays a central role in Cardano's on-chain governance system, reviewing and approving certain categories of governance actions, making the outcome of this vote consequential for how upcoming protocol decisions, including further steps in the Leios rollout, get approved going forward.</p>
<p>Together, the Leios throughput milestone, the new payment channel architecture, and the upcoming governance vote represent a busy stretch for Cardano's development roadmap. Whether the testnet gains translate into comparable real-world performance improvements once Leios reaches mainnet remains the key question the ecosystem will be watching as the upgrade progresses through its remaining development phases.</p>