PHP script render time / execution time

PHP 27

<?php
$enableRenderTime = false;
if ($enableRenderTime) {
$start = microtime(true);
$startMemory = memory_get_peak_usage();
}
?>
// code to measure
<?php
if ($enableRenderTime) {
$end = microtime(true);
$endMemory = memory_get_peak_usage();
$executionTime = $end - $start;
$totalTime = round($executionTime, 4);
$memoryUsage = $endMemory - $startMemory;
$totalMemory = round($memoryUsage / 1024 / 1024, 4);
echo "<section class='debug rendertime'>";
echo "<div class='executionTime'>Script execution time: " . $totalTime . " seconds</div>";
echo "<div class='memoryUsage'>Peak memory usage: " . $totalMemory . " mb</div>";
echo "</section>";
}
?>

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