Parallel Node Execution

Parallelism isn't just about speed. It is about breadth of thought.

The Single-Threaded Limit

If you ask an LLM: "Write a poem, check the weather, and query the database," and you do it sequentially, the latency stacks up. 5s + 2s + 3s = 10s.

The Parallel Advantage

If these tasks are independent, you can run them all at once. Max(5s, 2s, 3s) = 5s.

How LangGraph Handles It

If Node A has edges to Node B, Node C, and Node D, and they are all valid transitions (no conditional logic blocking them), LangGraph executes B, C, and D simultaneously. You don't need threading or asyncio boilerplate. The graph topology implies parallelism.