I need to loop through all products to build a xml - file but my script ceeps running for hours, and with every loop it seems getting slower. What can i do to speed it up ? First i loop through the category tree, when i find a "leaf" (endpoint) of a category, i try to get all of it's products with the following script:

$collection = Mage::getModel('catalog/category')
        ->addAttributeToFilter('category_id', $catId)
        ->addAttributeToFilter('type_id', 'simple')
        ->addAttributeToFilter('status', 1)->load();

Consideration Nr. 1:
Mage::getModel('catalog/product') in the foreach-loop:

      foreach($collection as $col) {
$prod = Mage::getModel('catalog/product')->load($col->getId());

But the performance is horrible

Consideration Nr. 2: ceeping the Mage::getModel('...') out of the loop by just loading a new id inside the loop

$prod = Mage::getModel('catalog/product');
foreach($collection as $col) {

The performance is much better but some product values are alway the same so i think this solution wound't work ?

The best way would be using the $collection data itself but i'miss some important data in the $collection.

How can i get all attributest of a product in a collection when i try to get all attributes by using the $collection i get this:

foreach($collection as $col) {
    echo "<pre>";


    echo "</pre>";


function getAttributes($prod) {
    $attributes = $prod->getAttributes();

    foreach ($attributes as $attribute) {
        if ($attribute->getIsVisibleOnFront()) {
            $value = $attribute->getFrontend()->getValue($prod);
            echo "The Value " . $value;
            if($value=='keine Angabe' || !$value)
            if ($attribute->getFrontendInput() == 'price' && is_string($value)) {
                $value = Mage::app()->getStore()->convertPrice($value, true);

            if (is_string($value) && strlen($value)) {
                $data[$attribute->getAttributeCode()] = array(
                    'label' => $attribute->getStoreLabel(),
                    'value' => $value,
                    'code'  => $attribute->getAttributeCode()
    return $data;

8 [color] => Array ( [label] => color [value] => No [code] => color )

But when i use the getModel i get the correct value

$_product = Mage::getModel('catalog/product')->load($col->getId());

[color] => Array ( [label] => color [value] => white [code] => color )

Is there any way to get all attributest by using the collection ?


  • What's the thing with people always building a collection and then load every item again in a loop? That's where you get bad performance...
    – 7ochem
    Commented Apr 14, 2015 at 8:45
  • What else to do if the collection does not contain the data i need ?
    – Cenzo
    Commented Apr 14, 2015 at 8:51
  • Fix your collection creation ;)
    – 7ochem
    Commented Apr 14, 2015 at 8:57
  • But how to get all attributes in the collection, for example the color ist not in the collection - data at all
    – Cenzo
    Commented Apr 14, 2015 at 9:17

3 Answers 3


Product Collection from Category

// Step 1
$category = Mage::getModel('catalog/category')->load($category_id);

// Step 2
$productCollection = Mage::getModel('catalog/product')->getCollection();

// Step 3

// Step 4
    ->addAttributeToFilter('type_id', 'simple')
    ->addAttributeToFilter('status', 1);

// Now you can loop through your collection
foreach($productCollection as $product) {
    // and so on...

So what's going on?

  1. We loaded a category model. We will use that in the product collection.
  2. We instantiated the product collection model.
  3. We added the category for filtering.
  4. We added the appropriate attributes for selection and filtering.

NOTE: Do not use the asterisk unless you plan on using every attribute being returned. Just like you shouldn't use the asterisk in a MySQL query unless you plan on getting everything from that table.

Once I have all my attributes and filters in place, I can loop through my collection. I do not need to call the load() method because lazy loading does that for me.

Once I'm in the loop, I have access to the product object Mage_Catalog_Model_Product. I do not need to instantiate another model inside the loop. The collection does this for me.

  • Thank you for your explanation, but we got a huge amount of products and many of them are configurable product, with lots of different attributes so i'm not able to say which attributes i need. So i want to get all attributes coresponding to the product with values. So i found the function getAttributes but only when i instantiate the product model the function returns what i want if i do it on the $collection i get no result. Is there any way to get all attributest of a product by not creating the model ?
    – Cenzo
    Commented Apr 14, 2015 at 12:14
  • You are able too get all names that can be used for a configurable by asking the Eav framework for exactly that. All attributes that can be used to create a configurable, have a flag for it set to true. Your point of entry would probably be eav/config but I don't have code handy right now to verify. Also, the difference between addAttributeToSelect('*') and ->load() is in _afterLoad() on the resource model.
    – user4351
    Commented May 8, 2015 at 18:19

Can't you just use the flat tables and read from those instead of loading every product. 'catalog/category_flat' rather than catalog/category is going to make the difference here since you are just reading.

  • The performance killer is not the category the big problem is the huge product amount (about 70.000).
    – Cenzo
    Commented Apr 14, 2015 at 9:01

To access all products limiting consumption of time and memory, the following piece of code can be used:

$products = Mage::getModel('catalog/product')
while ($product = $products->fetchItem()) {
  // do something

Pay attention: with flat catalog enabled, the selected attributes will only be the ones which satisfy the conditions defined in Mage_Catalog_Model_Product_Indexer::matchEvent() method.

To avoid performance bottleneck you have to write scalable code; to get the point I suggest you to read the following article by Vinai Kopp: http://vinaikopp.com/2014/06/09/preloading-for-scalabiliy/

Hope it helps.

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