Magento 2 deferred async web requests test

magento2-deferred-async-webrequests.php

<?php

require __DIR__ . '/app/bootstrap.php';

$bootstrap = \Magento\Framework\App\Bootstrap::create(BP, $_SERVER);
$objectManager = $bootstrap->getObjectManager();
$objectManager->get('\Magento\Framework\App\State')->setAreaCode('adminhtml');

$registry = $objectManager->get('\Magento\Framework\Registry');
$registry->register('isSecureArea', 'true');

####################################################################################################
## BEGIN

/**
 * Magento 2 Async Operations.
 * @see: https://devdocs.magento.com/guides/v2.4/extension-dev-guide/async-operations.html
 *
 * Guzzle sends async web requests using curl_multi_* functions.
 * @see: https://stackoverflow.com/a/35675265
 */

use Magento\Framework\HTTP\AsyncClientInterface;
use Magento\Framework\HTTP\AsyncClient\Request;

//Start the clock.
$start = microtime(true);

//Do deferred operations.
$firstSecondsEndpoint = 'https://httpstat.us/200?sleep=10000';
$secondSecondsEndpoint = 'https://httpstat.us/201?sleep=10000';

/** @var AsyncClientInterface $asyncClient */
$asyncClient = $objectManager->get(AsyncClientInterface::class);

$asyncOperations = [
    $asyncClient->request(new Request($firstSecondsEndpoint, 'GET', ['Accept' => 'text/plain'], null)),
    $asyncClient->request(new Request($secondSecondsEndpoint, 'GET', ['Accept' => 'text/plain'], null))
];

foreach ($asyncOperations as $asyncOperation) {
    echo $asyncOperation->get()->getBody() . PHP_EOL;
}

//End clock time.
$end = microtime(true);
$total = ceil($end - $start);
echo "Execution time of script = {$total} sec";

/*
Sample response.

200 OK
201 Created
Execution time of script = 12 sec
*/

####################################################################################################
## END

$registry->unregister('isSecureArea');