md5 vs. sha1 vs. crc32

hashtest

PHP Version 5.4.30

--------------------------------------------------
Testing 0 char string over 100,000 iterations:

md5                           113.2709980011 ms
sha1                          117.16985702515 ms
crc32                         78.847885131836 ms
--------------------------------------------------
Testing 1 char string over 100,000 iterations:

md5                           105.99207878113 ms
sha1                          114.00294303894 ms
crc32                         76.585054397583 ms
--------------------------------------------------
Testing 5 char string over 100,000 iterations:

md5                           106.14204406738 ms
sha1                          113.75713348389 ms
crc32                         78.852891921997 ms
--------------------------------------------------
Testing 50 char string over 100,000 iterations:

md5                           104.63809967041 ms
sha1                          115.33093452454 ms
crc32                         89.761018753052 ms
--------------------------------------------------
Testing 100 char string over 100,000 iterations:

md5                           117.97094345093 ms
sha1                          128.39221954346 ms
crc32                         98.706960678101 ms
--------------------------------------------------
Testing 1000 char string over 100,000 iterations:

md5                           294.61193084717 ms
sha1                          314.38899040222 ms
crc32                         287.9581451416 ms

--------------------------------------------------
               average (ms)        total (ms)
--------------------------------------------------
md5            140.43768246969     842.62609481812
sha1           150.50701300303     903.04207801819
crc32          118.45199267069     710.71195602417

hashtest.php

<?php

$iterations = 100000;

function randomString($len) {
    $chars = "0123456789abcdefghijklmnopqrstuvwxyz";
    return substr(str_shuffle(str_repeat($chars, ceil($len/strlen($chars)))), 0, $len);    
}

$values = [
    '0'    => '',
    '1'    => randomString(1),
    '5'    => randomString(5),
    '50'   => randomString(50),
    '100'  => randomString(100),
    '1000' => randomString(1000),
];

$totals = [
    'md5'   => 0,
    'sha1'  => 0,
    'crc32' => 0,
];

echo "PHP Version ".phpversion()."\n\n";

foreach ($values as $name => $value) {
    echo str_repeat('-', 50)."\n";

    echo "Testing {$name} char string over ".number_format($iterations)." iterations:\n\n";

    $start = microtime(true);

    for ($i = 0; $i < $iterations; $i++) {
        md5($value);
    }

    $end = microtime(true);

    $duration = ($end - $start) * 1000;

    $totals['md5'] += $duration;

    echo str_pad('md5', 30)."{$duration} ms\n";

    //-----------------------------------------------------------------------------

    $start = microtime(true);

    for ($i = 0; $i < $iterations; $i++) {
        sha1($value);
    }

    $end = microtime(true);

    $duration = ($end - $start) * 1000;

    $totals['sha1'] += $duration;

    echo str_pad('sha1', 30)."{$duration} ms\n";

    //-----------------------------------------------------------------------------

    $start = microtime(true);

    for ($i = 0; $i < $iterations; $i++) {
        crc32($value);
    }

    $end = microtime(true);

    $duration = ($end - $start) * 1000;

    $totals['crc32'] += $duration;

    echo str_pad('crc32', 30)."{$duration} ms\n";

    //-----------------------------------------------------------------------------
}

echo "\n".str_repeat('-', 50)."\n";
echo str_pad('', 15);
echo str_pad('average (ms)', 20);
echo str_pad('total (ms)', 20)."\n";
echo str_repeat('-', 50)."\n";

foreach ($totals as $name => $total) {
    echo str_pad($name, 15);
    echo str_pad($total/count($values), 20);
    echo str_pad($total, 20)."\n";
}

echo "\n";