PrestaShop/PrestaShop — pull request #473 by madef (2013-06-02 18:19:34+00:00)
Title: [*] Project : Add paging to Collections

I do not see any way to limit the number of objects in a Collection. Collection::setPageSize() and Collection::setPageNumber() add a limit clause to the query.
For example:
$collection = new Collection('Customer');
$collection->setPageSize(10); // Get ten customers
$collection->setPageNumber(2); // Start with the eleventh
$collection->getResults();