$segment = 10000;

        $maxValue = 10000;

        for($j = 1; $j < 10; $j++)
        {
            $operations = $segment*$j;

            $size = 0;

            $set = new HashSet();

            $start = microtime(true);

            for($i = 0; $i < $operations; $i++)
            {
                $value = rand(1, $maxValue);
                if($set->add($value))
                {
                    $size++;
                }
            }

            $end = microtime(true);

            echo $size;

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

            echo "\nHashSet: {$operations}, {$duration}";

            $arraySet = [];

            $size = 0;

            $start = microtime(true);

            for($i = 0; $i < $operations; $i++)
            {
                $value = rand(1, $maxValue);
                if(!in_array($value, $arraySet))
                {
                    $arraySet[] = $value;
                    $size++;
                }
            }

            $end = microtime(true);

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

            echo "\narray {$operations}, {$duration}";

            $ice = new Set();

            $size = 0;

            $start = microtime(true);

            for($i = 0; $i < $operations; $i++)
            {
                $value = rand(1, $maxValue);
                if($ice->add($value))
                {
                    $size++;
                }
            }

            $end = microtime(true);

            $this->assertEquals($size, $ice->size());

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

            echo "\nIce: {$operations}, {$duration}";
        }