#!/usr/bin/env perl

use Modern::Perl;
use Mojo::UserAgent;

my @all_url = ('http://127.0.0.1:3000/') x 200;
my $concurrent_load = 100;

my $ua = Mojo::UserAgent->new;
while (@all_url) {
    my @concurrent_read = map {
        $ua->get_p($_)->then(sub {
            my $tx = shift;
            my $result = $tx->result;
            if ($result->is_success) {
                say $result->dom->at('title')->text
            }
            else {
                say $result->is_error ? $result->message :
                    "Unknown response from Mojo::UserAgent";
            }
        }) # end ->then sub
    } splice @all_url, 0, $concurrent_load;
    Mojo::Promise->all(@concurrent_read)->wait;
}