Memory

<?
    ini_set("memory_limit","1500K");

    echo 'php: ' . phpversion() . '<br/>';
    echo 'usage: ' . round(($bef = memory_get_usage(false)) / 1024, 1) . ' kB (int size: ' . PHP_INT_SIZE . ')<br/>';

    $tm = microtime(true);

    class smt {
        private $a;
        private $b;
        private $c;

        public function __construct($a, $b, $c) {
            $this->a = $a;
            $this->b = $b;
            $this->c = $c;
        }

        public function get_sum() { return $this->a + $this->b + $this->c; }
    }

    gc_disable();

    for ($i=0; $i<10; $i++) {
       echo '=== ITERACE '.$i.'===<br/>';
       $data = array();

        for ($sf = 0; $sf < 1000; $sf++) {
            $data[] = array(
                'value_1' => (int)rand(),
                'value_2' => (int)rand(),
                'value_3' => (int)rand(),
                'value_4' => (int)rand()

                //'ref' => new smt(rand(), rand(), rand())
            );
        }

        echo 'usage_'.$i.': ' . round(($t = memory_get_usage(false)) / 1024, 1) . ' kB (diff ' . round(($t - $bef) / 1024, 1) . ' kB ~ ' . ($t - $bef) . ' B)<br/>';
        echo 'time_'.$i.': ' . round((microtime(true) - $tm), 2) . ' sec<br/>';

        $top = $sf = $a = $sum1 = $b = $sum2 = $tt = null;
        $data = NULL;
        unset($data);

        echo 'usage after unset_'.$i.' - emalloc: ' . round(($t = memory_get_usage(false)) / 1024, 1) . ' kB<br/>';
        echo 'usage after unset_'.$i.' - real: ' . round(($t = memory_get_usage(true)) / 1024, 1) . ' kB<br/>';
    }

?>