What are the differences between TypeScript async iterators and regular iterators?

What are the differences between TypeScript async iterators and regular iterators?

TypeScript async iterators allow you to iterate over asynchronous data sources, while regular iterators work with synchronous data. Async iterators use the for await...of syntax, enabling you to handle promises seamlessly.

Can you give me an example of how to use async iterators?

Sure! Here's a simple example:

async function* asyncGenerator() {
    yield 'Hello';
    yield 'World';
}

async function run() {
    for await (const value of asyncGenerator()) {
        console.log(value);
    }
}
run();

This will log 'Hello' and 'World' asynchronously.

What are some use cases for async iterators?

Async iterators are great for handling streams of data, such as reading files, fetching data from APIs, or processing events in real-time. They allow you to work with data as it arrives without blocking the main thread.

Are there any performance differences between the two?

Yes, async iterators can introduce some overhead due to the handling of promises, but they are essential for non-blocking operations. Regular iterators are generally faster for synchronous data, but they can't handle asynchronous data sources.