Online PHP editor | perf for Btrh0

@ 2023-02-28T11:53:37Z

<?php

$arr = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z'];
$arrK = array_combine($arr, array_fill(0, count($arr), true));

$iters = 1_000_000;

$t = microtime(true);
for ($i = 0; $i < $iters; $i++) {
    $v = ($i % 2) ? 'a' : 'c';
    $res = in_array($v, $arr);
    $res = in_array($v, $arr);
    $res = in_array($v, $arr);
    $res = in_array($v, $arr);
}
var_dump(microtime(true) - $t);

$t = microtime(true);
for ($i = 0; $i < $iters; $i++) {
    $v = ($i % 2) ? 'a' : 'c';
    $res = array_key_exists($v, $arrK);
    $res = array_key_exists($v, $arrK);
    $res = array_key_exists($v, $arrK);
    $res = array_key_exists($v, $arrK);
}
var_dump(microtime(true) - $t);

$t = microtime(true);
for ($i = 0; $i < $iters; $i++) {
    $v = ($i % 2) ? 'a' : 'c';
    $res = array_key_exists($v, array_keys($arr));
    $res = array_key_exists($v, array_keys($arr));
    $res = array_key_exists($v, array_keys($arr));
    $res = array_key_exists($v, array_keys($arr));
}
var_dump(microtime(true) - $t);

print_r(opcache_get_status());

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)
8.2.3	0.008	0.540	17.69
8.2.2	0.000	0.485	19.53
8.2.1	0.003	0.510	17.63
8.2.0	0.013	0.490	17.67
8.1.16	0.010	0.548	17.34
8.1.15	0.007	0.565	17.53
8.1.14	0.013	0.549	17.37
8.1.13	0.010	0.561	17.47
8.1.12	0.017	0.549	17.49
8.1.11	0.020	0.537	17.45
8.1.10	0.026	0.549	17.50
8.1.9	0.010	0.548	17.45
8.1.8	0.022	0.546	17.49
8.1.7	0.013	0.551	17.46
8.1.6	0.007	0.545	17.57
8.1.5	0.007	0.554	17.59
8.1.4	0.010	0.581	17.57
8.1.3	0.007	0.556	19.42
8.1.2	0.007	0.566	17.59
8.1.1	0.010	0.554	17.60
8.1.0	0.010	0.553	17.53
8.0.28	0.010	0.568	16.82
8.0.27	0.007	0.576	16.82
8.0.26	0.007	0.556	16.80
8.0.25	0.003	0.589	16.89
8.0.24	0.000	0.593	16.88
8.0.23	0.010	0.592	16.89
8.0.22	0.007	0.560	16.73
8.0.21	0.010	0.598	16.68
8.0.20	0.010	0.587	16.87
8.0.19	0.000	0.562	16.85
8.0.18	0.007	0.590	16.89
8.0.17	0.010	0.582	16.78
8.0.16	0.007	0.570	16.89
8.0.15	0.013	0.641	16.91
8.0.14	0.020	0.629	16.89
8.0.13	0.013	0.623	16.78
8.0.12	0.000	0.559	16.70
8.0.11	0.007	0.563	16.82
8.0.10	0.007	0.589	16.82
8.0.9	0.003	0.582	16.87
8.0.8	0.010	0.586	16.82
8.0.7	0.007	0.563	16.73
8.0.6	0.010	0.559	16.82
8.0.5	0.003	0.559	16.79
8.0.3	0.007	0.567	16.78
8.0.2	0.007	0.554	16.76
8.0.1	0.000	0.580	16.90

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