PHP CPU Benchmark

<?php
 
$start_time = microtime(true);
$done = 0;
$count = 0;
 
while (!$done) {
    for ($idx = 0; $idx < 10000; $idx++) {
        $x = 45 * 67 / 2 + $idx - 239892382.23232323;
        $y = 3483434.33483 / 28328372 * 384 + $idx - $x;
    }
    $count++;
    $now = microtime(true);
    if ($now - $start_time >= 1.0) { $done = 1; }
}
 
echo 'CPU Benchmark: ' . $count . "\n";
 
?>