Testing memory usage of Feed-IO

feed_memory_usage.php

<?php
require __DIR__."/vendor/autoload.php";

$client = new GuzzleHttp\Client();

$feed = $argv[1];

echo "Reading $feed" . PHP_EOL . PHP_EOL;

print_mem_usage('before request');
$res = $client->request('GET', $feed);
print_mem_usage('after request');
echo "stream size (PSR way) : {$res->getBody()->getSize()}" . PHP_EOL;
print_mem_usage('after reading stream size (PSR way)');
echo "stream size (strlen) : " . strlen($res->getBody()) . PHP_EOL;
print_mem_usage('after reading stream size (strlen)');

function print_mem_usage($step)
{
    echo "{$step}" . PHP_EOL;
    echo "allocated to PHP: " . memory_get_usage(true)  . PHP_EOL;
    echo "Used by PHP: " . memory_get_usage()  . PHP_EOL;
    echo "Used at peak: " . memory_get_peak_usage()  . PHP_EOL;
    echo "------" . PHP_EOL;
}