PHP Loops benchmark

for1.php

<?php

for ($i = 0; $i < $boundary; $i++) {
    $acc++;
}

for2.php

<?php

for (; $boundary--;) {
    $acc++;
}

for3.php

<?php

for (; $acc <= $boundary; $acc++) {
}

goto.php

<?php

start:

$acc++;

if (--$boundary) {
    goto start;
}

main.php

<?php

$iteration = $boundary = pow(10, 8);
$acc = 0;

$startTime = microtime(true);

echo 'Starting '.$argv[1]."...\n";

$file = './'.$argv[1].'.php';

echo file_get_contents($file);

include $file;

echo microtime(true) - $startTime . "s\n";

echo number_format($iteration) . " iterations \n";
echo number_format($acc) . " accumulated \n";

echo memory_get_peak_usage() / 1000 . "MB\n\n\n";

object.php

<?php

class A {
    private $boundary;
    private $acc;

    public function __construct($boundary, $acc) {
        $this->boundary = $boundary;
        $this->acc      = $acc;
    }

    public function __destruct() {
        global $loop, $acc;
        if ($this->boundary) {
            $acc++;
            $loop = new A(--$this->boundary, $acc);
        } else {
            echo number_format($acc) . " accumulated \n";
        }
    }
}

$loop = new A($boundary, $acc);

recursion1.php

<?php

$callback = function($boundary, $acc) use (&$callback) {
    return $boundary ? $callback($boundary--, $acc++) : $acc;
};

$acc = $callback($boundary, $acc);

recursion2.php

<?php

function callback($boundary, $acc) {
    if ($boundary) {
        return function () use ($boundary, $acc) {
            return callback(--$boundary, ++$acc);
        };
    }

    return $acc;
};

function trampoline($fn, $args) {
    while (is_callable($fn)) {
        $fn = call_user_func_array($fn, $args);
    }

    return $fn;
}

$acc = trampoline('callback', [$boundary, $acc]);

runner.sh

php -d memory_limit=500M -d max_execution_time=60 main.php for1
php -d memory_limit=500M -d max_execution_time=60 main.php for2
php -d memory_limit=500M -d max_execution_time=60 main.php while
php -d memory_limit=500M -d max_execution_time=60 main.php recursion1
php -d memory_limit=500M -d max_execution_time=60 main.php recursion2
php -d memory_limit=500M -d max_execution_time=60 main.php goto
time php -d memory_limit=500M -d max_execution_time=60 main.php object

while.php

<?php

while ($boundary--) {
    $acc++;
}