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6. Aptos Parallel Execution (Block-STM)

Optimistic concurrency control for smart contracts.

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Aptos uses Block-STM (Software Transactional Memory) to execute transactions in parallel optimistically. If conflicts are detected between memory reads and writes across concurrent transactions, conflicting transactions are dynamically re-executed.

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Check your understanding

1. How does Aptos achieve high transaction throughput?
Block-STM optimistic parallel execution engineSingle-threaded executionState sharding into 1000 chainsOff-chain server execution
2. Do developers need to declare read/write accounts upfront in Aptos Move?
No, Block-STM dynamically tracks read/write memory locations at runtimeYes, alwaysOnly for coinsOnly on devnet

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