What are good alternatives to select and non-blocking I/O, and how do they compare?

Alternatives to select, Non-blocking I/O, Asynchronous programming, Event-driven programming
This article explores good alternatives to select and non-blocking I/O in Perl, including asynchronous programming and event-driven frameworks, comparing their efficiency and ease of use. 

        // Example of using AnyEvent for non-blocking I/O in Perl
        use AnyEvent;

        my $w = AnyEvent->timer( after => 1, sub {
            print "Timer expired after 1 second\n";
        });

        print "Waiting for timer...\n";
        AnyEvent->condvar->recv; // wait indefinitely

Alternatives to select Non-blocking I/O Asynchronous programming Event-driven programming

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