What are the differences between async iterators and generators?

What are the differences between async iterators and generators?

Async iterators allow for asynchronous iteration, while generators are synchronous. Async iterators use the 'async' keyword.

Can you give me an example of each?

Sure! A generator can be defined using 'function*', while an async iterator uses 'async function*'. Here's a quick example:

Generator:

function* syncGenerator() {
  yield 1;
  yield 2;
}

Async Iterator:

async function* asyncGenerator() {
  yield await fetchData();
}

When would I use one over the other?

Use async iterators when dealing with asynchronous data sources, like APIs. Use generators for synchronous data.

Are there any performance differences?

Yes, async iterators can introduce overhead due to their asynchronous nature, while generators are generally faster for synchronous tasks.