decbin benchmarks

gistfile1.txt

<?php

function h_tom($decimal){
     $result = array();
     $digit = floor(log($decimal,2))+1;

     for($i = 0 ; $i < $digit ; $i++)
          $result[$i] = $decimal&(1<<$i) ? 1:0;

     return $result;
}

function php_decbin($decimal) {
    $result = array();
    while ($decimal) {
        array_push($result, $decimal % 2);
        $decimal = floor($decimal / 2);
    }
    return $result;
}

function i110($decimal) {
    $result = array();
    while ($decimal) {
        array_push($result, $decimal & 1);
        $decimal >>= 1;
    }
    return $result;
}

function bench($names, $count) {
    $results = array();
    while ($count--) {
        foreach ($names as $name) {
            $st = microtime(true);;
            $name(rand(1, 65535));
            $et = microtime(true);;
            $results[$name] += $et - $st;
        }
    }
    foreach ($results as $name => $cum) {
        echo $name . "\t" . $cum . "\n";
    }
}

bench(
    array('h_tom', 'i110', 'php_decbin', 'decbin'),
    1000000
);

// h_tom	8.1964886188507
// i110	8.3208520412445
// php_decbin	12.559322118759
// decbin	1.5397775173187