preg_match timing loop
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Authored by dancy on Aug 19 2021, 3:11 PM.

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	F34606345: preg_match timing loop
	Aug 19 2021, 3:11 PM

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	<?php
	$start = microtime(true);

	$loops = 1000 * 1000;

	for ($i = 0; $i<$loops; $i++) {
	$etcdHost = "_etcd._tcp.eqiad.wmnet";
	$protocol = 'https';

	if ( preg_match( ',^(https?)://(.*)$,', $etcdHost, $matches ) ) {
	$protocol = $matches[1];
	$etcdHost = $matches[2];
	}
	}

	$elapsed = microtime(true) - $start;
	$per_loop = $elapsed / $loops;
	$us_per_loop = $per_loop * 1000 * 1000;
	$ns_per_loop = $per_loop * 1000 * 1000 * 1000;

	echo("Elapsed seconds: $elapsed\n");
	echo("Seconds per loop: $per_loop\n");
	echo("us per loop: $us_per_loop\n");
	echo("ns per loop: $ns_per_loop\n");

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