Update Product Attributes

update_product_attribute

<?php 
 /** 
  * This code only updates the attributes you want to change. 
  *  The first paramater is an array of product IDs, 
  *  the second is an array of attribute names and values, 
  *  and then the third is the store ID you wish to update.
  *  This is MUCH faster than saving the entire model.
  *  Ref Link: http://stackoverflow.com/questions/3669211/saving-in-magento-taking-a-very-very-long-time
  */
  
  Mage::getSingleton('catalog/product_action')
      ->updateAttributes(array($product->getId()), $attributesData, $storeId);