Online PHP editor | perf for nPNqI

@ 2013-08-27T18:53:06Z

<?php

$string1 = 'aaaaaaaaaaaaaaaaaaaa';
$string2 = 'bbbbbbbbbbbbbbbbbbbb';
$string3 = 'cccccccccccccccccccc';
$string4 = 'dddddddddddddddddddd';
$string5 = 'eeeeeeeeeeeeeeeeeeee';


$results = array();

$time1 = microtime(true);
for ($i = 0; $i<1000000; $i++) {
    $concatTest1 = $string1 . $string2 . $string3 . $string4 . $string5;
}
unset($i);
$time2 = microtime(true);
$testDuration1 = $time2 - $time1;
$results['Test1'] = $testDuration1;

$time3 = microtime(true);
for ($i = 0; $i<1000000; $i++) {
    $concatTest2 = "{$string1}{$string2}{$string3}{$string4}{$string5}";
}
unset($i);
$time4 = microtime(true);
$testDuration2 = $time4 - $time3;
$results['Test2'] = $testDuration2;


$time5 = microtime(true);
for ($i = 0; $i<1000000; $i++) {
    $concatTest3 = implode('', array(
        $string1, $string2, $string3, $string4, $string5
    ));
}
unset($i);
$time6 = microtime(true);
$testDuration3 = $time6 - $time5;
$results['Test3'] = $testDuration3;

$time7 = microtime(true);
for ($i = 0; $i<1000000; $i++) {
    $concatTest4 = sprintf('%s%s%s%s%s', array(
		$string1, $string2, $string3, $string4, $string5
    ));
}
unset($i);
$time8 = microtime(true);
$testDuration4 = $time8 - $time7;
$results['Test4'] = $testDuration4;


$finalResults = sort($results);

var_dump($finalResults);

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)
5.4.19	0.023	1.083	19.00
5.4.18	0.003	0.723	19.17
5.4.17	0.017	1.163	18.94
5.4.16	0.040	1.087	19.10
5.4.15	0.023	1.117	19.05
5.4.14	0.023	1.207	16.31
5.4.13	0.017	1.130	16.42
5.4.12	0.003	0.773	16.14
5.4.11	0.023	1.090	16.21
5.4.10	0.007	0.747	16.11
5.4.9	0.003	0.733	16.21
5.4.8	0.020	1.093	16.42
5.4.7	0.027	1.263	16.38
5.4.6	0.050	1.163	16.41
5.4.5	0.027	1.063	16.25
5.4.4	0.030	1.397	16.25
5.4.3	0.053	1.163	16.19
5.4.2	0.050	1.077	16.35
5.4.1	0.030	1.197	16.16
5.4.0	0.043	1.193	15.68
5.3.27	0.017	1.160	14.38
5.3.26	0.010	1.200	14.32
5.3.25	0.003	1.173	14.25
5.3.24	0.030	1.180	14.39
5.3.23	0.037	1.203	14.25
5.3.22	0.037	1.163	14.21
5.3.21	0.023	1.263	14.36
5.3.20	0.020	1.150	14.32
5.3.19	0.053	1.233	14.43
5.3.18	0.030	1.260	14.32
5.3.17	0.033	1.190	14.43
5.3.16	0.033	1.233	14.36
5.3.15	0.037	1.217	14.36
5.3.14	0.037	1.357	14.31
5.3.13	0.030	1.230	14.41
5.3.12	0.023	1.113	14.33
5.3.11	0.050	1.277	14.32
5.3.10	0.007	1.223	13.80
5.3.9	0.063	1.187	13.80
5.3.8	0.040	0.940	13.71
5.3.7	0.033	1.110	13.73
5.3.6	0.027	0.847	13.70
5.3.5	0.023	1.217	13.69
5.3.4	0.027	0.947	13.66
5.3.3	0.040	1.087	13.59
5.3.2	0.013	1.267	13.40
5.3.1	0.027	1.110	13.36
5.3.0	0.030	1.263	13.34

preferences:dark modelive preview