Aptos makes Block-STM v2 its default parallel execution engine

The upgraded engine processes transactions simultaneously and only redoes the ones that collide, with no changes required from users or developers Aptos has switched its blockchain to a new default engine for processing transactions. Block-STM v2, the upgraded version of the network’s parallel execution system, now runs by default on the Layer-1 chain. Most users will never notice the change. That is sort of the point: the upgrade happens under the hood, and neither users nor decentralized applications need to do anything. The technical term for this is optimistic concurrency control.

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