Aptos announced that Block-STM v2 is now enabled by default on its mainnet. The updated parallel execution engine uses software transactional memory, optimistic execution, and multi-version memory to process transactions concurrently while handling conflicts. The upgrade is designed to increase transaction throughput and improve network scalability.
Refer to the official tweet by APT:
• Software transactional memory: the engine handles concurrency, not devs
• Optimistic execution: run first, validate after, redo on conflict
• Multi-version memory: dependent transactions pause, not restartBlock-STM v2 now runs by default on mainnet. More throughput, more…
— Aptos Labs (@AptosLabs) October 15, 2026
APT Info
Aptos is a new, independent high-performance Layer 1 project focused on delivering the safest and most scalable blockchain in the world. The Aptos blockchain leverages the Move programming language to make transactions fast and secure.
The Aptos data model enables flexible key management and hybrid custodial options. This, alongside transaction transparency prior to signing and practical light client protocols, provides a safer and more trustworthy user experience.
To achieve high throughput and low latency, the Aptos blockchain leverages a pipelined and modular approach for the key stages of transaction processing. Specifically, transaction dissemination, block metadata ordering, parallel transaction execution, batch storage, and ledger certification all operate concurrently. This approach fully leverages all available physical resources, improves hardware efficiency, and enables highly parallel execution.
