gistfile1.php

<?php

include 'vendor/autoload.php';

use React\Dns\Resolver\Factory as DnsResolverFactory;
use React\HttpClient\ConnectionManager;
use React\HttpClient\SecureConnectionManager;
use React\HttpClient\Client;
use React\EventLoop\Factory as LoopFactory;
use React\HttpClient\Response;

$loop = LoopFactory::create();

$dnsResolverFactory = new DnsResolverFactory();
$dnsResolver = $dnsResolverFactory->createCached('8.8.8.8', $loop);

$connectionManager = new ConnectionManager($loop, $dnsResolver);
$secureConnectionManager = new SecureConnectionManager($loop, $dnsResolver);
$client = new Client($loop, $connectionManager, $secureConnectionManager);

$reference = memory_get_usage();

$loop->addPeriodicTimer(1, function () use ($client, &$reference) {
    $request = $client->request('GET', 'http://127.0.0.1:80/');
    $request->writeHead();

    $memory = memory_get_usage();
    echo sprintf("memory usage : %d, delta : %d\n", $memory, $memory - $reference);
    $reference = $memory;
});

$loop->run();