To avoid the cost of creating objects the standard way (new Foo()) and instead create a prototype and clone it.

• Large amounts of data (e.g. create 1,000,000 rows in a database at once via a ORM).

You can also find these code on GitHub

index.php

.. literalinclude:: index.php
   :language: php
   :linenos:

BookPrototype.php

.. literalinclude:: BookPrototype.php
   :language: php
   :linenos:

BarBookPrototype.php

.. literalinclude:: BarBookPrototype.php
   :language: php
   :linenos:

FooBookPrototype.php

.. literalinclude:: FooBookPrototype.php
   :language: php
   :linenos: