Online PHP editor | perf for s2FVR

@ 2020-02-26T16:48:46Z

<?php

$challenges = [
    100, 100, 100, 100, 100, 100, 100, 100, 100, 100,
    250, 250, 250, 250, 250, 250, 250, 250, 250, 250,
    500, 500, 500, 500, 500, 500, 500, 500, 500, 500,
    1000, 1000, 1000, 1000, 1000, 1000, 1000, 1000, 1000, 1000,
];

$permutations = [];
$scores = [];

for ($i = 0; $i < 100000; $i++) {
    shuffle($challenges);
    $key = implode('', $challenges);
    $permutations[$key] = isset($permutations[$key]) ? $permutations[$key] + 1 : 1;
    $score = 0;
    foreach ($challenges as $challenge) {
        $score += $challenge;
        $scores[$score] = isset($scores[$score]) ? $scores[$score] + 1 : 1;
    }
}

ksort($scores);

echo "\nUnique permutations generated: " . count($permutations);
echo "\nUnique scores found: " . count($scores) . "\n\n";
echo "Score\tCount\n";
foreach ($scores as $score => $count) {
    echo "{$score}\t$count\n";
}
echo "\n";

foreach ($permutations as $key => $count) {
    if ($count > 1) {
        echo "\nPermutation occurred {$count} times: " . $key;
    }
}

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)
7.4.3	0.026	0.518	35.78
7.4.2	0.026	0.543	35.93
7.4.1	0.026	0.552	35.64
7.4.0	0.023	0.580	35.93
7.3.15	0.043	0.543	35.98
7.3.14	0.020	0.584	35.75
7.3.13	0.029	0.589	35.76
7.3.12	0.037	0.631	35.70
7.3.11	0.046	0.702	35.69
7.3.10	0.046	0.870	35.57
7.3.9	0.030	0.675	35.67
7.3.8	0.042	0.843	35.86
7.3.7	0.026	0.633	35.95
7.3.6	0.043	0.612	35.70
7.3.5	0.053	0.510	35.79
7.3.4	0.023	0.587	35.71
7.3.3	0.043	0.711	35.66
7.3.2	0.036	0.552	35.88
7.3.1	0.040	0.564	35.68
7.3.0	0.074	0.564	35.94
7.2.28	0.025	0.771	35.43
7.2.27	0.036	0.716	35.42
7.2.26	0.033	0.777	35.30
7.2.25	0.052	0.729	35.65
7.2.24	0.052	0.709	35.53
7.2.23	0.040	0.706	35.66
7.2.22	0.042	1.052	35.37
7.2.21	0.026	0.966	35.54
7.2.20	0.029	0.793	35.41
7.2.19	0.039	0.663	35.63
7.2.18	0.033	0.633	35.54
7.2.17	0.033	0.680	35.31
7.2.16	0.040	0.802	35.36
7.2.15	0.056	0.653	35.73
7.2.14	0.062	0.694	35.57
7.2.13	0.059	0.824	35.61
7.2.12	0.046	0.654	35.64
7.2.11	0.056	0.674	35.62
7.2.10	0.046	0.653	35.61
7.2.9	0.039	0.801	35.56
7.2.8	0.029	0.634	35.57
7.2.7	0.033	0.645	35.56
7.2.6	0.043	0.661	35.70
7.2.5	0.043	0.666	35.35
7.2.4	0.030	0.892	35.52
7.2.3	0.026	0.732	35.57
7.2.2	0.036	0.660	35.51
7.2.1	0.030	0.609	35.59
7.2.0	0.056	0.917	35.54

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