use strict;
use warnings;

use Coro;
use Coro::EV;

use Coro::LWP;
use LWP::Simple;

use Coro::Timer qw(sleep);


async {
    while (1) {
        CORE::select undef, undef, undef, 0.5;
        print "first\n";
        # my $r = get "http://www.perlmonks.org";
        # print length $r, "\n";
        # sleep 0;
        cede;
    }
};

async {
    while (1) {
        CORE::select undef, undef, undef, 0.5;
        print "second\n";
        # sleep 0;
        cede;
    }
};

EV::loop while 1;
[download]

output:

first
second
first
second
first
second
...
[download]

When uncomment

my $r = get "http://www.perlmonks.org";
print length $r, "\n";
[download]

got output:

first
second
second
second
second
second
second
second
[download]

Then uncomment "sleep 0" and got output :

first
second
76573
second
first
second
76570
second
first
second
76597
second
first
second
[download]

---

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