What are the differences between coroutines and promises?

What are the differences between coroutines and promises?

Coroutines and promises are both used for asynchronous programming, but they have different mechanisms. Promises represent a value that may be available now, or in the future, while coroutines allow you to write asynchronous code that looks synchronous.

Can you explain how they work in JavaScript?

Sure! In JavaScript, promises are objects that represent the eventual completion (or failure) of an asynchronous operation. Coroutines, on the other hand, are often implemented using async/await syntax, which allows you to pause execution until a promise is resolved.

Which one is better for handling asynchronous tasks?

It depends on the use case. Promises are great for chaining multiple asynchronous operations, while coroutines can make the code cleaner and easier to read, especially when dealing with complex flows.

Are there any performance differences between them?

Generally, the performance difference is minimal, but coroutines can be more efficient in certain scenarios due to their ability to yield execution without blocking the thread.