Cardano's Leios Protocol Delivers Sixfold Throughput Gains in Public Testnet Phase

Cardano's Leios protocol has demonstrated sixfold throughput gains in its first public testnet phase, peaking at 26.8 transaction kilobytes per second (TxkB/s). This is a significant improvement over Cardano's existing Ouroboros Praos system, which has a ceiling of 4.51 TxkB/s.

During the 41-day test, Leios carried 54% of traffic reaching the chain and processed 18 times the transaction count seen on Cardano mainnet over the comparable period. However, it's worth noting that the traffic was artificially generated to stress the system rather than produced by users paying to transact.

The economic viability of Leios is still a concern for ADA holders. As reserve contributions decline, network activity will need to shoulder more of the cost of rewarding stake pool operators and delegators. Leios is designed to remove the throughput ceiling that could otherwise prevent Cardano from generating enough transaction fees to make this transition.

The engineering side of the equation is starting to take shape, but whether users fill the additional blockspace is now the harder question. Input Output has set a longer-term goal of taking Cardano from roughly 800,000 transactions a month to more than 27 million while becoming economically self-sufficient as reserve funding declines.

Leios will need enough paid usage to finance the infrastructure securing it. If usage falls short, the pressure will move elsewhere. Smaller pool rewards can leave less for delegators after operators take declared costs and margins. Higher transaction fees offer another lever, but only if users continue paying them.