pathinfo vs dirname.php

<?php
//https://3v4l.org/IoNmr
$dir = null;

$m = memory_get_usage();
$t = microtime(true);

for($i = 0; $i < 10000; $i++)
{
    $dir = \dirname('/etc/crontab');
}

var_dump(
    memory_get_usage() - $m, 
    microtime(true) - $t
);

echo $dir. "\n";

$m = memory_get_usage();
$t = microtime(true);

for($i = 0; $i < 10000; $i++)
{
    $dir = \pathinfo('/etc/crontab', \PATHINFO_DIRNAME);
}

var_dump(
    memory_get_usage() - $m, 
    microtime(true) - $t
);

echo $dir. "\n";