CPU & RAM Benchmarking in php

benchmark_example.php

<?php

// Script start
$usage_start = getrusage();

echo "PHP RAM Usage 1: " . convert(memory_get_usage()) . "\n";

ob_start();

// Start Code

$result = [];

for ($i = 0; $i < 10000000; $i++) {

	switch (true) {
		case $i == 0:
			echo 0;
			$result[] = str_repeat("Hello", 4242);
			break;
		case $i > 0 && $i < 5:
			echo 5;
			$result[] = str_repeat("Hello", 4242);
			break;
		case $i > 5 && $i < 10:
			echo 10;
			$result[] = str_repeat("Hello", 4242);
			break;
		case $i > 10 && $i < 15:
			echo 15;
			$result[] = str_repeat("Hello", 4242);
			break;
		case $i > 15 && $i < 20:
			echo 15;
			$result[] = str_repeat("Hello", 4242);
			break;
		case $i > 20 && $i < 25:
			echo 15;
			$result[] = str_repeat("Hello", 4242);
			break;
		case $i > 25 && $i < 30:
			echo 15;
			$result[] = str_repeat("Hello", 4242);
			break;
		case $i > 30 && $i < 35:
			echo 15;
			$result[] = str_repeat("Hello", 4242);
			break;
		case $i > 35 && $i < 40:
			echo 15;
			$result[] = str_repeat("Hello", 4242);
			break;
		case $i > 15 && $i < 110:
			echo 10;
			$result[] = str_repeat("Hello", 4242);
			break;
		case $i > 110 && $i < 115:
			echo 15;
			$result[] = str_repeat("Hello", 4242);
			break;
		case $i > 115 && $i < 120:
			echo 15;
			break;
		case $i > 120 && $i < 125:
			echo 15;
			$result[] = str_repeat("Hello", 4242);
			break;
		case $i > 125 && $i < 130:
			echo 15;
			$result[] = str_repeat("Hello", 4242);
			break;
		case $i > 130 && $i < 135:
			echo 15;
			$result[] = str_repeat("Hello", 4242);
			break;
		case $i > 135 && $i < 140:
			echo 15;
			$result[] = str_repeat("Hello", 4242);
			break;
	}

}

ob_clean();


echo "PHP RAM Usage 2: " . convert(memory_get_usage()) . "\n";

unset($result);

echo "PHP RAM Usage 3: " . convert(memory_get_usage()) . "\n";

// Script end
function convert($size)
{
	$unit = array('B', 'KB', 'MB', 'GB', 'TB', 'PT');
	return @round($size / pow(1024, ($i = floor(log($size, 1024)))), 2) . ' ' . $unit[$i];
}

function check($ru, $rus, $index)
{
	return ($ru["ru_$index.tv_sec"] * 1000 + intval($ru["ru_$index.tv_usec"] / 1000))
		- ($rus["ru_$index.tv_sec"] * 1000 + intval($rus["ru_$index.tv_usec"] / 1000));
}

$usage_end = getrusage();

echo "This process used " . check($usage_end, $usage_start, "utime") .
	" ms for its computations.\n";
echo "It spent " . check($usage_end, $usage_start, "stime") .
	" ms in system calls.\n";

benchmark_template.php

<?php

// Script start
$usage_start = getrusage();

echo "PHP RAM Usage - Start: " . convert(memory_get_usage()) . "\n";

ob_start();

// Start Code

/* Your Code */

ob_clean();


echo "PHP RAM Usage - End: " . convert(memory_get_usage()) . "\n";

// Script end
function convert($size)
{
	$unit = array('B', 'KB', 'MB', 'GB', 'TB', 'PT');
	return @round($size / pow(1024, ($i = floor(log($size, 1024)))), 2) . ' ' . $unit[$i];
}

function check($ru, $rus, $index)
{
	return ($ru["ru_$index.tv_sec"] * 1000 + intval($ru["ru_$index.tv_usec"] / 1000))
		- ($rus["ru_$index.tv_sec"] * 1000 + intval($rus["ru_$index.tv_usec"] / 1000));
}

$usage_end = getrusage();

echo "This process used " . check($usage_end, $usage_start, "utime") .
	" ms for its computations.\n";
echo "It spent " . check($usage_end, $usage_start, "stime") .
	" ms in system calls.\n";