MAGETWO-55299: [Customer] Fast Save of Product Variations

     - MAGETWO-55787: Fast saving of product with high number of variations generated

Author: kandy

app/code/Magento/Eav/Model/ResourceModel/CreateHandler.php

@@ -102,7 +102,6 @@ public function execute($entityType, $entityData, $arguments = [])
                 : null; // @todo verify is it normal to not have attributer_set_id
             /** @var \Magento\Eav\Model\Entity\Attribute\AbstractAttribute $attribute */
             foreach ($this->getAttributes($entityType, $attributeSetId) as $attribute) {
-                $ac[] = $attribute->getAttributeCode();
                 if ($attribute->isStatic()) {
                     continue;
                 }

app/code/Magento/Eav/Model/ResourceModel/UpdateHandler.php

@@ -67,6 +67,7 @@ class UpdateHandler implements AttributeInterface
      * @param AttributePersistor $attributePersistor
      * @param ReadSnapshot $readSnapshot
      * @param ScopeResolver $scopeResolver
+     * @param AttributeLoader $attributeLoader
      */
     public function __construct(
         AttributeRepository $attributeRepository,
@@ -86,15 +87,6 @@ public function __construct(
         $this->attributeLoader = $attributeLoader ?: ObjectManager::getInstance()->get(AttributeLoader::class);
     }
 
-    /**
-     * @deprecated
-     * @return \Magento\Eav\Model\Entity\AttributeCache
-     */
-    private function getAttributeCache()
-    {
-        return ObjectManager::getInstance()->get(\Magento\Eav\Model\Entity\AttributeCache::class);
-    }
-
     /**
      * @param string $entityType
      * @param int $attributeSetId
@@ -104,6 +96,7 @@ protected function getAttributes($entityType, $attributeSetId = null)
     {
         return $this->attributeLoader->getAttributes($entityType, $attributeSetId);
     }
+
     /**
      * @param string $entityType
      * @param array $entityData