- microtime: documentation ( source)
<?php
$a = ['a' => 1, 'b' => 2, 'c' => 3];
$b = new stdClass();
$b->a = 1;
$b->b = 2;
$b->c = 3;
echo microtime(true), PHP_EOL;
for ($i = 0; $i < 100000; $i++) {
$a['a'];
}
echo microtime(true), PHP_EOL;
for ($i = 0; $i < 100000; $i++) {
$b->a;
}
echo microtime(true), PHP_EOL;