Cache all attribute options for display in layered navigation #943 (#942

)

* Cache all attribute options for display in layered navigation
This will improve performance by reducing the amount of SQL Queries when fetching all possible attributes to display in the layered navigation

* Use the attribute's own cache tags

Co-authored-by: Ricardo Velhote <ricardo@caretobeauty.com>

app/code/core/Mage/Eav/Model/Entity/Attribute/Source/Table.php

@@ -51,10 +51,16 @@ public function getAllOptions($withEmpty = true, $defaultValues = false)
             $this->_optionsDefault = array();
         }
         if (!isset($this->_options[$storeId])) {
+            $idPrefix = 'ATTRIBUTE_OPTIONS_ID_' . $this->getAttribute()->getId();
+            $tags = array_merge(
+                array('eav', Mage_Core_Model_Translate::CACHE_TAG),
+                $this->getAttribute()->getCacheTags()
+            );
             $collection = Mage::getResourceModel('eav/entity_attribute_option_collection')
                 ->setPositionOrder('asc')
                 ->setAttributeFilter($this->getAttribute()->getId())
                 ->setStoreFilter($this->getAttribute()->getStoreId())
+                ->initCache(Mage::app()->getCache(), $idPrefix, $tags)
                 ->load();
             $this->_options[$storeId]        = $collection->toOptionArray();
             $this->_optionsDefault[$storeId] = $collection->toOptionArray('default_value');