Parallel Execution Using Async/Await and Promise.all()
Explore how to implement parallel asynchronous execution in Node.js using async/await and the Promise.all function. Understand the differences between awaiting promises sequentially versus using Promise.all to handle multiple promises concurrently. Learn why Promise.all is preferred for early error detection and optimal performance, and see practical examples that demonstrate unlimited parallel execution in asynchronous functions.
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There are mainly two ways to run a set of tasks in parallel using async/await; one purely uses the await expression and the other relies on the Promise.all() function. They’re both very simple to implement; however, be advised that the method relying on Promise.all() is the recommended (and optimal) one to use.
Web spider using async/await and Promise.all()
Let’s see an example of both. Let’s consider the spiderLinks() ...