iterator_to_array is too slow

Question

In following PHP script iterator_to_array is extremely inefficient (I used a profiler). Is there any better alternative for following code?

$new = [];
$rows=(new Mongo())->table1->find(['foo' => 'bar'),
$new['string'] = iterator_to_array($rows);  //Time-consuming part
(new Mongo())->table2->save($new);

Answer 1

I think there is no alternative, if you have an iterator and you want an array, you need to iterate the iterator and pass the values to the array, you can do it by yourself using foreach or you can use iterator_to_array, but if you have many elements in the iterator, the process is time-consuming.