for_vs_fill_01_for

$nTimes = 100000;

function microtime_float() {
  list($usec, $sec) = explode(' ', microtime());
  return ((float)$usec + (float)$sec);
}

$smem = memory_get_usage();
$stime = microtime_float();

$i = 0;
while ($i < $nTimes) {
  $aFor = array();
  for ( $o = 0, $c = 10; $o < $c; $o++ )
    $aFor[] = mt_rand();
  unset($aFor);
  $i++;
}

$etime = microtime_float();
$emem = memory_get_usage();
$time = $etime - $stime;
$mem = $emem - $smem;

echo 'for loop ran ' . $nTimes . ' times: ' . $time . ' seconds, mem: ' . $mem . ".\n";