What are the differences between EventMachine and Async?

What are the differences between EventMachine and Async?

EventMachine is a network library for Ruby that provides event-driven I/O, while Async is a newer library that focuses on concurrency and simplicity. EventMachine uses a reactor pattern, whereas Async uses fibers for lightweight concurrency.

Which one is better for handling high concurrency?

Async is generally considered better for high concurrency due to its use of fibers, which allows for more efficient handling of multiple tasks without blocking.

Can you give me an example of how to use Async?

Sure! Here's a simple example: you can use Async do to run tasks concurrently. For instance, fetching multiple URLs at once.

What about the performance comparison between the two?

Performance can vary based on the use case, but Async often outperforms EventMachine in scenarios with many concurrent tasks due to its non-blocking nature.