- ob_start: documentation ( source)
- microtime: documentation ( source)
- round: documentation ( source)
- ob_clean: documentation ( source)
<?php
$timer = microtime(1);
ob_start();
for ($i=1;$i<=1000000;$i++)
echo 'a','a','a','a';
ob_clean();
$timer = round(microtime(1) - $timer, 3);
echo ', took: '.$timer. ' seconds'.PHP_EOL;