Aoe_ModelCache

Instructions

Load models from cache

Replace..., _(*1)

$product = Mage::getModel('catalog/product')->load($id);

... with, _(*2)

$product = Mage::helper('aoe_modelcache')->get('catalog/product', $id);

If the model was create before the previous instance will be reused. If it wasn't created before it will be created now., _(*3)

Forcing clean model

$product = Mage::helper('aoe_modelcache')->get('catalog/product', $id, true);

The difference to Mage::getModel('catalog/product')->load($id) is, that the created model will be cached and can be reused for future calls without the clean parameter, _(*4)

Check if model exists in cache

$modelExists = Mage::helper('aoe_modelcache')->exists('catalog/product', $id);

Remove model from cache

Mage::helper('aoe_modelcache')->removeFromCache('catalog/product', $id);

Finding candidates for optimization

Enable the log from System > Configuration > ADVANCED > Developer > AOE Model Cache Log Settings and check var/log/aoemodelcache.log after hitting a page. You'll find all occurrences of models that have been loaded more than once incl. file and line where the call happened. These items are candidates for replacement by model cache calls., _(*5)

Caution!

Please test the shop properly after having any changes in place. Side-effects where fresh objects are expected and a "used" instances is returned are possible., _(*6)