Solana’s Alpenglow Upgrade Reaches Second Test Network Ahead of Mainnet Launch

Solana’s planned upgrade to dramatically speed up transaction finality has now reached both of its public test networks, giving developers a chance to check their applications before the change reaches the live blockchain. Called Alpenglow, the upgrade aims to cut transaction settlement time to roughly 150 milliseconds, down sharply from the current 12.8 seconds.

How the Upgrade Changes Validator Behavior

The improvement centers on how validators, the computers responsible for checking transactions, reach agreement on network records. Instead of recording votes as transactions inside blocks, validators will exchange votes directly, allowing agreement within one or two voting rounds. This change means faster confirmation for activities like exchange withdrawals or merchant payment confirmations.

Developers Must Adjust Some Tracking Tools

The shift will also affect how transaction activity appears on data charts, since removing validator votes from block totals will make transaction counts appear smaller even without any change in actual user activity. Services tracking transaction histories will need updated methods to avoid recording incorrect information. Basic applications that simply send transactions and check balances require no changes.

No official launch date has been set for the live network, though the speed target remains based on simulation results rather than real world testing under full market conditions.