Solana's Alpenlow upgrade, expected to launch on testnet in December 2025, will reduce transaction finality times to 100-150 milliseconds and boost theoretical throughput to over 90,000 transactions per second.
"Right now, it takes about 12 seconds for a transaction on Salana to become considered final. Alpenlow is expected to reduce that to just 100 to 150 milliseconds. That is near instant confirmation. It also aims to boost theoretical throughput to over 90,000 transactions per second. This isn't some faroff dream either. The upgrade has already been approved by 98.9% of stakeholders and it's set to launch on testnet this December during the Salana Breakpoint conference."
