Online PHP editor | perf for bOdXP

@ 2020-04-30T10:57:04Z

<?php

$cnt = 1000;

$strs = [
    'empty' => '',
    'short' => 'zluty kun',
    'short_with_uc' => 'zluty Kun',
    'long' => str_repeat('this is about 10000 chars long string', 270),
    'long_with_uc' => str_repeat('this is about 10000 chars long String', 270),
    'short_utf8' => 'žlutý kůň',
    'short_utf8_with_uc' => 'Žlutý kŮň',
];

foreach ($strs as $k => $str) {
    $a1 = microtime(true);
    for($i=0; $i < $cnt; ++$i){
        $res = strtolower($str);
    }
    $t1 = microtime(true) - $a1;
    // echo 'it took ' . round($t1 * 1000, 3) . ' ms for ++$i'."\n";

    $a2 = microtime(true);
    for($i=0; $i < $cnt; $i++){
        $res = mb_strtolower($str);
    }
    $t2 = microtime(true) - $a2;
    // echo 'it took ' . round($t2 * 1000, 3) . ' ms for $i++'."\n";

    echo 'strtolower is '.round($t2/$t1, 2).'x faster than mb_strtolower for ' . $k . "\n\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)
7.4.5	0.013	0.493	16.57
7.4.4	0.010	0.468	16.73
7.4.3	0.026	0.476	16.51
7.4.2	0.029	0.420	16.53
7.4.1	0.010	0.468	16.68
7.4.0	0.010	0.471	16.67
7.3.17	0.019	0.454	16.58
7.3.16	0.026	0.545	16.71
7.3.15	0.013	0.491	16.58
7.3.14	0.013	0.438	16.42
7.3.13	0.003	0.464	16.78
7.3.12	0.003	0.508	16.53
7.3.11	0.010	0.411	16.62
7.3.10	0.006	0.410	16.74
7.3.9	0.010	0.429	16.56
7.3.8	0.013	0.456	16.80
7.3.7	0.013	0.424	16.41
7.2.29	0.025	2.215	16.80
7.2.28	0.032	2.250	16.85
7.2.27	0.025	2.342	16.80
7.2.26	0.023	2.407	16.77
7.2.25	0.007	2.262	16.66
7.2.24	0.023	2.312	16.90
7.2.23	0.009	2.263	16.90
7.2.22	0.016	2.449	16.82
7.2.21	0.010	2.461	16.83
7.2.20	0.042	2.422	16.58

preferences:dark modelive preview