What is the difference between async iterators and sync iterators?

What is the difference between async iterators and sync iterators?

Async iterators allow you to iterate over data asynchronously, while sync iterators work synchronously. This means async iterators can handle operations that take time, like fetching data from a server, without blocking the execution of your code.

Can you give me an example of each?

Sure! A sync iterator example is a simple array loop, while an async iterator can be created using the for await...of syntax to handle promises.

When would I use async iterators?

You'd use async iterators when dealing with streams of data or when fetching data from APIs, where you want to process items as they arrive.

Are there any performance differences?

Yes, async iterators can be more efficient in I/O-bound operations since they don't block the main thread, allowing other tasks to run concurrently.