Simple benchmark for file hashes

testHashing.php

<?php

// 2011542944 Dec  8 21:58 bigcsvfile.csv
$fileName = '/home/users/dtilgner/bigcsvfile.csv';

echo 'Performance benchmark (2 GB csv file) => md5_file(...) // hash_file("md5", ...) // hash_file("crc32", ...) // shell_exec("md5sum ...")' . PHP_EOL;

$md5FileTimes = [];
$hashFileMd5Times = [];
$hashFileCrc32Times = [];
$md5SumTimes = [];

echo '===================' . PHP_EOL . PHP_EOL . 'md5_file(...)' . PHP_EOL;

for ($i = 0; $i < 100; $i++) {
	$start = microtime(true);

	md5_file($fileName, true);

	$md5FileTimes[] = microtime(true) - $start;
}

echo 'Average run time: ' . (array_sum($md5FileTimes) / count($md5FileTimes)) . PHP_EOL; // Average run time: 4.9545040130615

echo '===================' . PHP_EOL . PHP_EOL . 'hash_file("md5", ...)' . PHP_EOL;

for ($i = 0; $i < 100; $i++) {
	$start = microtime(true);

	hash_file('md5', $fileName, true);

	$hashFileMd5Times[] = microtime(true) - $start;
}

echo 'Average run time: ' . (array_sum($hashFileMd5Times) / count($hashFileMd5Times)) . PHP_EOL; // Average run time: 4.7669960021973

echo '===================' . PHP_EOL . PHP_EOL . 'hash_file("crc32", ...)' . PHP_EOL;

for ($i = 0; $i < 100; $i++) {
	$start = microtime(true);

	hash_file('crc32', $fileName, true);

	$hashFileCrc32Times[] = microtime(true) - $start;
}

echo 'Average run time: ' . (array_sum($hashFileCrc32Times) / count($hashFileCrc32Times)) . PHP_EOL; // Average run time: 7.817800283432

echo '===================' . PHP_EOL . PHP_EOL . 'shell_exec("md5sum ...")' . PHP_EOL;

for ($i = 0; $i < 100; $i++) {
	$start = microtime(true);

	shell_exec('md5sum -b ' . escapeshellarg($fileName));

	$md5SumTimes[] = microtime(true) - $start;
}

echo 'Average run time: ' . (array_sum($md5SumTimes) / count($md5SumTimes)) . PHP_EOL; // Average run time: 3.625156712532