benchmark.php

<?php
$startTime = microtime(true);

$workingDir = "_bm";
$runs = [
	100,
	1000,
	10000,
	100000,
];

mkdir($workingDir);
chdir($workingDir);

$value = 0;
foreach($runs as $runIndex => $n) {
	echo "Running test $runIndex ($n)..." . PHP_EOL;
	for($i = 0; $i < $n; $i++) {
		file_put_contents(implode("-", [$n, $i]), $i);
	}

	echo "Created, checking..." . PHP_EOL;

	$files = glob("*");
	$found = 0;
	foreach($files as $f) {
		if(file_exists($f)) {
			$found ++;
			unlink($f);
		}
	}

	echo "Found $found files, should be " . count($files) . "." . PHP_EOL;
	$now = microtime(true);
	$duration = $now - $startTime;
	echo "Time: $duration" . PHP_EOL;
}

chdir("..");
rmdir($workingDir);