Online PHP editor | perf for NfFQ2

@ 2014-09-12T17:50:20Z

<?php

function uuid($c = 4) {
    $x = function($c) {
        for ($n = ''; strlen($n) < $c + 1; $n = $n.mt_rand());
        return substr($n, -$c);
    };
    return sprintf(
        '%s-%04d-%04d-%04d-%04d%04d',
        microtime(true) * 10000, $x($c), $x($c), $x($c), $x($c), $x($c), $x($c)
    );
}

$time = microtime();
$uuids = array();
for ($i = 0; $i < 1000; $i++) {
	$uuids[] = uuid();
}

if (count(array_unique($uuids)) != count($uuids)) {
	echo 'DUPLICATE';
} else {
	echo 'No duplicate';
print_r($uuids);
}

Here you find the average performance (time & memory) of each version. A grayed out version indicates it didn't complete successfully (based on exit-code).

Version	System time (s)	User time (s)	Memory (MiB)
7.2.10	0.155	0.010	15.31
7.2.9	0.136	0.010	15.01
7.2.8	0.182	0.003	15.23
7.2.7	0.145	0.007	15.16
7.2.6	0.110	0.003	15.28
7.2.5	0.139	0.013	15.30
7.2.4	0.115	0.013	14.88
7.1.22	0.119	0.006	14.22
7.1.21	0.141	0.006	14.13
7.1.20	0.146	0.006	14.27
7.1.19	0.141	0.006	14.13
7.1.18	0.111	0.012	14.22
7.1.17	0.177	0.003	13.99
7.0.31	0.127	0.013	14.10
7.0.30	0.150	0.012	13.94
5.6.38	0.034	0.006	14.77
5.6.37	0.003	0.027	14.74
5.6.36	0.024	0.013	14.81

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