zano3adev

Фича PHP:
php.net/manual/ru/features.gc.refcounting-basics.p...

Решения:
1. Вместо объекта использовать массив.
2. Сериализация/Десериализация объекта.

class TestMemory
{
    protected $memory_start;
    protected $memory_filled_array;
    protected $memory_empty_array;
    protected $memory_deleted_array;

    protected $array;

    public function __construct()
    {
        $this->memory_start = 0;
        $this->memory_filled_array = 0;
        $this->memory_empty_array = 0;
        $this->memory_deleted_array = 0;
    }

    public function runTest()
    {
        $this->memory_start = memory_get_usage();
        $this->array = [];
        for($i = 0; $i < 10000; $i++)
        {
            $object = new stdClass();
            $object->property1 = $i;
            $object->property2 = 123;
            $object->property3 = str_repeat('Str', 100);

            $this->array[] = serialize($object);
            unset($object);
        }
        $this->memory_filled_array = memory_get_usage();
        for($i = 0; $i < 10000; $i++)
        {
            $object = unserialize($this->array[$i]);
            //$object; //do some
            unset($this->array[$i], $object);
        }
        $this->memory_empty_array = memory_get_usage();
        unset($this->array, $i);
        $this->memory_deleted_array = memory_get_usage();
    }

    public function printResult()
    {
        $result = '---Result---' . '<br>';
        foreach($this as $name => $value)
        {
            if($name !== 'array')   $result .= $name . ': ' . number_format($value / 1024 / 1024, 2) . 'MB.' . '<br>';
        }
        $result .= 'Memory leak: ' . ($this->memory_deleted_array - $this->memory_start) . 'Byte' . '<br>';
        echo $result;
    }
}

$test = new TestMemory();
for($i = 0; $i < 5; $i++)
{
    $test->runTest();
    $test->printResult();
}