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run code in 300+ PHP versions simultaneously
<?php class Collection extends ArrayObject { protected $iterator; public function getIterator() { $this->iterator = new ArrayIterator($this); return $this->iterator; } } gc_enable(); foreach (range(1, 5000000) as $i) { $collection = new Collection([ 'foo', 'bar' ]); foreach ($collection as $item) { echo $item; } unset($collection); }

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62.28 ms | 402 KiB | 5 Q