Online PHP editor | perf for Xn1UY

@ 2013-05-04T11:39:46Z

<?php


$count = 100;

$start = microtime(true);
for ($i = 0; $i < $count; $i++) {
    $str = "abc";
    $str = preg_replace_callback('/a/', function($a) { return strtoupper($a[0]); }, $str);
	$str = preg_replace_callback('/b/', function($a) { return strtoupper($a[0]); }, $str);
    $str = preg_replace_callback('/c/', function($a) { return strtoupper($a[0]); }, $str);
    $str = preg_replace_callback('/a/', function($a) { return strtolower($a[0]); }, $str);
    $str = preg_replace_callback('/b/', function($a) { return strtolower($a[0]); }, $str);
    $str = preg_replace_callback('/c/', function($a) { return strtolower($a[0]); }, $str);
}
echo "Completed in " . (microtime(true) - $start) . " Seconds\n";

$start = microtime(true);
for ($i = 0; $i < $count; $i++) {
    $str = "abc";
    $str = preg_replace(array(
        	'/a/e',
            '/b/e',
            '/c/e',
            '/a/e',
            '/b/e',
            '/c/e',
        ),
        array(
            'strtoupper(\'$1\')',
            'strtoupper(\'$1\')',
            'strtoupper(\'$1\')',
            'strtolower(\'$1\')',
            'strtolower(\'$1\')',
            'strtolower(\'$1\')',
        ),
        $str
    );
}
echo "Completed in " . (microtime(true) - $start) . " Seconds\n";

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	0.019	0.000	15.02
7.2.9	0.165	0.007	15.24
7.2.8	0.009	0.012	15.13
7.2.7	0.152	0.003	15.13
7.2.6	0.014	0.003	14.82
7.2.5	0.177	0.000	14.89
7.2.4	0.155	0.010	15.13
7.2.3	0.167	0.006	14.88
7.2.2	0.157	0.003	15.38
7.2.1	0.012	0.012	15.04
7.2.0	0.171	0.010	15.27
7.1.22	0.195	0.011	13.91
7.1.21	0.160	0.003	13.86
7.1.20	0.003	0.011	14.21
7.1.19	0.162	0.003	14.01
7.1.18	0.032	0.004	13.97
7.1.17	0.009	0.013	13.90
7.1.16	0.188	0.006	13.98
7.1.15	0.126	0.003	13.82
7.1.14	0.125	0.006	14.27
7.1.13	0.017	0.004	13.95
7.1.12	0.036	0.003	14.23
7.1.11	0.132	0.013	14.11
7.1.10	0.098	0.009	14.21
7.1.9	0.050	0.008	13.82
7.1.8	0.075	0.000	13.83
7.1.7	0.007	0.007	13.97
7.1.6	0.068	0.003	32.07
7.1.5	0.046	0.007	32.11
7.1.4	0.180	0.009	31.89
7.1.3	0.051	0.007	32.00
7.1.2	0.076	0.004	32.12
7.1.1	0.010	0.005	13.98
7.0.31	0.116	0.006	13.83
7.0.30	0.010	0.009	13.61
7.0.29	0.149	0.010	13.72
7.0.28	0.123	0.015	13.75
7.0.27	0.008	0.008	13.82
7.0.26	0.120	0.006	13.71
7.0.25	0.115	0.000	13.74
7.0.24	0.050	0.006	13.72
7.0.23	0.019	0.004	13.61
7.0.22	0.005	0.012	13.61
7.0.21	0.131	0.007	13.61
7.0.20	0.174	0.009	13.69
7.0.19	0.014	0.000	13.97
7.0.18	0.127	0.009	13.61
7.0.17	0.077	0.014	13.65
7.0.16	0.009	0.009	13.62
7.0.15	0.010	0.007	13.68
5.6.38	0.010	0.005	14.59
5.6.37	0.003	0.018	14.11
5.6.36	0.005	0.011	14.58
5.6.35	0.004	0.013	14.43
5.6.34	0.020	0.000	14.46
5.6.33	0.013	0.000	14.35
5.6.32	0.014	0.004	14.46
5.6.31	0.008	0.008	14.38
5.6.30	0.012	0.012	14.46

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