Non-blocking / Asynchronous Execution in Perl

Question

Is there a way to implement non-blocking / asynchronous execution (without fork()\'ing) in Perl?

I used to be a Python developer for many years... Python has really great

Answer 1

No other callback can start running while another is already running!

As far as I can tell - this is the same with all languages (per CPU thread of course; modern web servers usually spawn a least one process or thread per CPU core, so it will look (to users) like stuff it working in parallel, but the long-running callback didn't get interrupted, some other core just did that work).

You can't interrupt an interrupt, unless the interrupted interrupt has been programmed specifically to accommodate it.

Imagine code that takes 1min to run, and a PC with 16 cores - now imagine a million people try to load that page, you can deliver working results to 16 people, and "time out" all the rest, or, you can crash your web server and give no results to anyone. Folks choose not to crash their web server, which is why they never permit callbacks to interrupt other callbacks (not that they could even if they tried - the caller never gets control back to make a new call before the prior one has ended anyhow...)