What are the differences between various async hooks in Node.js?

What are the differences between various async hooks in Node.js?

In Node.js, async hooks provide a way to track asynchronous resources. The main types include 'before', 'after', 'destroy', and 'init'. Each serves a different purpose in monitoring the lifecycle of async operations.

Can you explain how the 'init' and 'before' hooks differ?

Sure! The 'init' hook is called when an async resource is created, while the 'before' hook is called just before the callback is executed. This means 'init' is for setup, and 'before' is for pre-execution.

Are there any performance implications when using async hooks?

Yes, using async hooks can introduce some overhead, as they add additional tracking to async operations. It's important to use them judiciously to avoid performance bottlenecks.

What are some common use cases for async hooks?

Common use cases include tracking request lifecycles, managing context in asynchronous operations, and debugging async code.