Memory use of a Range class in Plater Library

plater_range.php

<?
use x7c1\plater\collection\immutable\Range;
class SampleRangeTest extends \PHPUnit_Framework_TestCase{
    public function test_memory(){
        foreach(new range(1, 700000) as $i){
            //Memory: 2.50Mb
        }
    }
}
// see also
// https://github.com/x7c1/Plater/blob/master/src/main/collection/immutable/Range.php

raw_range.php

<?
class SampleRangeTest extends \PHPUnit_Framework_TestCase{
    public function test_memory(){
        foreach(range(1, 700000) as $i){
            //Memory: 101.50Mb
        }
    }
}