Online PHP editor | perf for 6PXGO

@ 2014-05-30T07:42:55Z

<?php

$iterations = 10000;

function str_random($length=16) {
    $pool = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';

    return substr(str_shuffle(str_repeat($pool, 5)), 0, $length);

}

$strings = array();

for ($i = 0; $i < $iterations; $i++) {
    $strings[] = str_random(rand(16, 64));
}

echo 'String size: ', round(strlen(serialize($strings))/ 1024, 2), 'kb', PHP_EOL;

$hashes_md5   = array();
$hashes_crc32 = array();

$t_md5 = microtime(true);
foreach ($strings as $s) {
    $hashes_md5['x'.(crc32($s) >> 8)] = 0;
}
$t_md5 = microtime(true) - $t_md5;

//$max = bindec('111111111111111111111111111111');
//$max = 0xFFFFFFF; //F;  +5% size boost, collision:   0.1689%, time boost: 0%
$max = 0xFFFFFF; //FF; +14% size boost, collision:   2.908%,  time boost: -9%
//$max = 0xFFFFF; //FFF; +47% size boost, collision: 35.5696%,  time boost: 0%

// modify 10% of data
for ($i = 0; $i < $iterations; $i++) {
    if (rand(1,100) > 90) {
        $strings[$i] = str_random(rand(16, 64));
    }
}

$t_crc32 = microtime(true);
foreach ($strings as $s) {
    $hashes_crc32['x'.(crc32($s) >> 8)] = 0;
}
$t_crc32 = microtime(true) - $t_crc32;


function compareShingles(array $first, array $second)
{
    $t_crc32 = microtime(true);

    echo 'func intersect: ', count(array_intersect_key($first, $second)), PHP_EOL;
    echo '   func unique: ', count(array_merge($first, $second)), PHP_EOL;
    $t_crc32 = microtime(true) - $t_crc32;
    echo '          time: ', $t_crc32, PHP_EOL;

    $t_crc32 = microtime(true);
    $diff_count      = count(array_diff_key($first, $second));
    $intersect_count = count($first) - $diff_count;// count(array_intersect_key($first, $second));
    $unique_count    = count($second) + $diff_count;

    echo 'calculated intersect: ', $intersect_count, PHP_EOL;
    echo '   calculated unique: ', $unique_count, PHP_EOL;
    $t_crc32 = microtime(true) - $t_crc32;
    echo '          time: ', $t_crc32, PHP_EOL;
    //return round(($intersect_count / $unique_count) / 0.01, 2);
}

$hashes_md5_flip = $hashes_md5; //array_flip($hashes_md5);
$hashes_crc32_flip = $hashes_crc32; //array_flip($hashes_crc32);

//ksort($hashes_md5_flip);
//ksort($hashes_crc32_flip);

$t_merge = microtime(true);
$hashes_diff = array_diff_key($hashes_md5_flip, $hashes_crc32_flip);
$t_merge = microtime(true) - $t_merge;

$t_diff = microtime(true);
$hashes_merge = array_merge($hashes_md5_flip, $hashes_crc32_flip);
$t_diff = microtime(true) - $t_diff;

$t_intersect = microtime(true);
$hashes_intersect = array_intersect_key($hashes_md5_flip, $hashes_crc32_flip);
$t_intersect = microtime(true) - $t_intersect;

echo PHP_EOL;

echo '  merge time: ', $t_merge, PHP_EOL;
echo ' merge count: ', count($hashes_merge), PHP_EOL;
echo '   diff time: ', $t_merge, PHP_EOL;
echo '  diff count: ', count($hashes_diff), PHP_EOL;
echo ' intersect time: ', $t_intersect, PHP_EOL;
echo 'intersect count: ', count($hashes_intersect), PHP_EOL;
echo '   md5 count: ', count($hashes_md5_flip), ' with diff:', count($hashes_md5_flip)+count($hashes_diff), ' intersect: ', count($hashes_md5_flip)-count($hashes_diff), PHP_EOL;
echo ' crc32 count: ', count($hashes_crc32_flip), ' with diff:', count($hashes_crc32_flip)+count($hashes_diff), ' intersect: ', count($hashes_crc32_flip)-count($hashes_diff), PHP_EOL;

echo PHP_EOL;

compareShingles($hashes_md5_flip, $hashes_crc32_flip);

echo PHP_EOL;

exit;

$s_md5   = strlen(serialize($hashes_md5));
$s_crc32 = strlen(serialize($hashes_crc32));

$u_hashes_md5   = array_unique($hashes_md5);
$u_hashes_crc32 = array_unique($hashes_crc32);

$su_md5   = strlen(serialize($u_hashes_md5));
$su_crc32 = strlen(serialize($u_hashes_crc32));

echo 'time   md5: ', $t_md5, PHP_EOL;
echo 'time crc32: ', $t_crc32, PHP_EOL;
echo 'time boost: ', round(($t_md5 - $t_crc32) / $t_md5, 2) * 100, '%', PHP_EOL;

echo PHP_EOL;

echo 'size   md5: ', $s_md5, PHP_EOL;
echo 'size crc32: ', $s_crc32, PHP_EOL;
echo 'size boost: ', round(($s_md5 - $s_crc32) / $s_md5, 2) * 100, '%', PHP_EOL;

echo PHP_EOL;

echo 'unique size   md5: ', $su_md5, ' (', $cnt_hashes_md5 = count($u_hashes_md5), ')', PHP_EOL;
echo 'unique size crc32: ', $su_crc32, ' (', $cnt_hashes_crc32 = count($u_hashes_crc32), ')', PHP_EOL;
echo 'unique size boost: ', round(($su_md5 - $su_crc32) / $su_md5, 2) * 100, '%', PHP_EOL;
echo '        collision: ', round(($cnt_hashes_md5 - $cnt_hashes_crc32) / $cnt_hashes_md5, 6) * 100, '%', PHP_EOL;

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)
7.3.1	0.007	0.087	22.60
7.3.0	0.003	0.081	22.25
7.2.13	0.003	0.099	22.86
7.2.12	0.000	0.101	22.88
7.2.11	0.007	0.105	22.64
7.2.10	0.003	0.100	22.84
7.2.9	0.013	0.092	22.97
7.2.8	0.007	0.097	22.69
7.2.7	0.000	0.100	23.00
7.2.6	0.003	0.100	22.89
7.2.5	0.007	0.093	22.96
7.2.4	0.003	0.097	22.79
7.2.3	0.013	0.092	23.06
7.2.2	0.010	0.092	22.58
7.2.1	0.013	0.088	23.00
7.2.0	0.005	0.092	24.02
7.1.25	0.007	0.132	19.79
7.1.24	0.013	0.126	19.73
7.1.23	0.003	0.132	19.59
7.1.22	0.007	0.152	19.63
7.1.21	0.000	0.133	19.84
7.1.20	0.007	0.130	19.86
7.1.19	0.003	0.123	19.66
7.1.18	0.003	0.124	19.89
7.1.17	0.003	0.124	19.56
7.1.16	0.010	0.116	19.57
7.1.15	0.003	0.132	19.75
7.1.14	0.003	0.120	19.80
7.1.13	0.003	0.126	19.76
7.1.12	0.007	0.126	19.91
7.1.11	0.010	0.118	19.87
7.1.10	0.013	0.124	20.00
7.1.9	0.007	0.133	19.88
7.1.8	0.000	0.128	19.69
7.1.7	0.005	0.129	20.38
7.1.6	0.008	0.155	20.46
7.1.5	0.005	0.153	20.31
7.1.4	0.007	0.122	19.73
7.1.3	0.003	0.120	19.94
7.1.2	0.000	0.134	19.86
7.1.1	0.007	0.117	19.41
7.1.0	0.002	0.169	23.01
7.0.33	0.000	0.118	19.44
7.0.32	0.010	0.109	19.32
7.0.31	0.000	0.110	19.30
7.0.30	0.013	0.099	19.63
7.0.29	0.003	0.104	19.06
7.0.28	0.007	0.103	19.35
7.0.27	0.003	0.106	19.30
7.0.26	0.003	0.106	19.38
7.0.25	0.007	0.103	19.61
7.0.24	0.007	0.101	19.48
7.0.23	0.007	0.119	19.39
7.0.22	0.003	0.110	19.51
7.0.21	0.013	0.094	19.48
7.0.20	0.035	0.081	19.78
7.0.19	0.013	0.100	19.31
7.0.18	0.013	0.097	19.31
7.0.17	0.007	0.106	19.39
7.0.16	0.003	0.105	19.48
7.0.15	0.007	0.100	19.40
7.0.14	0.003	0.121	22.74
7.0.13	0.010	0.103	19.45
7.0.12	0.003	0.113	19.33
7.0.11	0.003	0.110	19.53
7.0.10	0.027	0.118	21.80
7.0.9	0.010	0.121	21.85
7.0.8	0.012	0.117	21.83
7.0.7	0.010	0.099	21.69
7.0.6	0.005	0.104	21.63
7.0.5	0.017	0.115	22.08
7.0.4	0.005	0.097	16.84
7.0.3	0.010	0.110	16.80
7.0.2	0.008	0.093	16.82
7.0.1	0.012	0.096	16.84
7.0.0	0.007	0.128	16.77
5.6.38	0.003	0.127	23.14
5.6.37	0.010	0.120	22.79
5.6.36	0.007	0.128	22.97
5.6.35	0.013	0.117	23.23
5.6.34	0.003	0.130	22.97
5.6.33	0.023	0.108	22.56
5.6.32	0.010	0.123	23.14
5.6.31	0.010	0.122	23.32
5.6.30	0.010	0.119	23.05
5.6.29	0.007	0.127	22.90
5.6.28	0.005	0.134	26.12
5.6.27	0.003	0.127	23.31
5.6.26	0.013	0.130	22.99
5.6.25	0.013	0.149	26.11
5.6.24	0.012	0.128	25.94
5.6.23	0.018	0.129	26.07
5.6.22	0.018	0.137	26.05
5.6.21	0.008	0.119	25.88
5.6.20	0.005	0.142	26.44
5.6.19	0.013	0.146	26.39
5.6.18	0.008	0.126	26.44
5.6.17	0.010	0.136	26.62
5.6.16	0.017	0.146	26.46
5.6.15	0.010	0.144	26.25
5.6.14	0.017	0.126	26.64
5.6.13	0.007	0.151	26.44
5.6.12	0.011	0.108	26.34
5.6.11	0.010	0.115	26.57
5.6.10	0.005	0.138	26.44
5.6.9	0.012	0.131	26.20
5.6.8	0.010	0.118	25.93
5.6.7	0.010	0.138	26.11
5.6.6	0.018	0.124	26.16
5.6.5	0.008	0.137	26.02
5.6.4	0.012	0.109	26.05
5.6.3	0.018	0.110	26.04
5.6.2	0.012	0.128	26.01
5.6.1	0.013	0.135	25.87
5.6.0	0.015	0.110	26.09
5.5.38	0.010	0.135	24.29
5.5.37	0.007	0.133	24.39
5.5.36	0.010	0.111	24.39
5.5.35	0.008	0.142	24.55
5.5.34	0.012	0.111	24.49
5.5.33	0.005	0.139	24.73
5.5.32	0.015	0.150	24.93
5.5.31	0.013	0.135	24.79
5.5.30	0.013	0.142	24.80
5.5.29	0.013	0.120	24.58
5.5.28	0.007	0.144	24.52
5.5.27	0.017	0.119	24.53
5.5.26	0.010	0.141	24.78
5.5.25	0.015	0.113	24.63
5.5.24	0.008	0.128	24.28
5.5.23	0.013	0.136	24.18
5.5.22	0.003	0.153	24.49
5.5.21	0.003	0.134	24.23
5.5.20	0.008	0.139	24.31
5.5.19	0.013	0.134	24.43
5.5.18	0.010	0.141	24.44
5.5.17	0.000	0.141	19.54
5.5.16	0.015	0.118	24.21
5.5.15	0.008	0.122	24.19
5.5.14	0.010	0.139	24.04
5.5.13	0.015	0.126	24.48
5.5.12	0.007	0.126	24.34
5.5.11	0.013	0.129	24.33
5.5.10	0.007	0.115	24.25
5.5.9	0.010	0.114	24.27
5.5.8	0.003	0.135	24.05
5.5.7	0.008	0.126	24.32
5.5.6	0.008	0.144	24.30
5.5.5	0.008	0.140	26.52
5.5.4	0.022	0.115	26.67
5.5.3	0.016	0.140	26.47
5.5.2	0.003	0.135	26.55
5.5.1	0.010	0.126	26.42
5.5.0	0.012	0.137	26.46
5.4.45	0.020	0.121	26.07
5.4.44	0.010	0.130	26.23
5.4.43	0.010	0.137	26.06
5.4.42	0.008	0.134	25.98
5.4.41	0.008	0.131	26.03
5.4.40	0.008	0.129	25.73
5.4.39	0.007	0.144	25.88
5.4.38	0.015	0.122	25.88
5.4.37	0.008	0.141	25.90
5.4.36	0.012	0.128	25.93
5.4.35	0.015	0.121	25.83
5.4.34	0.015	0.132	25.82
5.4.33	0.007	0.124	21.96
5.4.32	0.008	0.145	25.95
5.4.31	0.018	0.133	25.85
5.4.30	0.012	0.146	25.89
5.4.29	0.010	0.137	25.89
5.4.28	0.013	0.134	25.97
5.4.27	0.008	0.128	25.77
5.4.26	0.017	0.128	25.74
5.4.25	0.013	0.112	25.84
5.4.24	0.013	0.129	25.79
5.4.23	0.010	0.142	25.86
5.4.22	0.010	0.135	25.96
5.4.21	0.007	0.126	25.84
5.4.20	0.012	0.128	25.81
5.4.19	0.007	0.124	25.78
5.4.18	0.010	0.144	26.05
5.4.17	0.007	0.122	25.76
5.4.16	0.008	0.123	25.83
5.4.15	0.013	0.111	25.74
5.4.14	0.010	0.129	24.54
5.4.13	0.013	0.130	24.63
5.4.12	0.021	0.123	24.66
5.4.11	0.012	0.126	24.57
5.4.10	0.003	0.132	24.63
5.4.9	0.015	0.106	24.63
5.4.8	0.012	0.135	24.61
5.4.7	0.010	0.120	24.73
5.4.6	0.005	0.142	24.67
5.4.5	0.008	0.135	24.63
5.4.4	0.012	0.133	24.62
5.4.3	0.008	0.127	24.60
5.4.2	0.008	0.112	24.61
5.4.1	0.008	0.151	24.67
5.4.0	0.015	0.121	24.26
5.3.29	0.008	0.137	23.10
5.3.28	0.007	0.140	23.28
5.3.27	0.008	0.153	23.17
5.3.26	0.012	0.133	23.23
5.3.25	0.005	0.130	23.07
5.3.24	0.008	0.125	23.13
5.3.23	0.005	0.119	22.97
5.3.22	0.008	0.142	23.04
5.3.21	0.008	0.149	23.10
5.3.20	0.012	0.140	23.07
5.3.19	0.008	0.153	23.08
5.3.18	0.005	0.142	23.07
5.3.17	0.010	0.136	23.10
5.3.16	0.010	0.143	23.04
5.3.15	0.008	0.149	23.23
5.3.14	0.013	0.142	22.94
5.3.13	0.012	0.137	23.06
5.3.12	0.007	0.150	22.96
5.3.11	0.010	0.149	23.16
5.3.10	0.008	0.133	22.85
5.3.9	0.010	0.125	22.85
5.3.8	0.007	0.120	22.72
5.3.7	0.003	0.155	22.80
5.3.6	0.007	0.129	22.65
5.3.5	0.015	0.142	22.80
5.3.4	0.015	0.120	22.78
5.3.3	0.012	0.142	22.83
5.3.2	0.010	0.142	22.60
5.3.1	0.008	0.133	22.56
5.3.0	0.005	0.114	20.38

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