How to assign categories for products in magento Programmatically

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I am a newbie in magento. Basically I want to assign multiple products to multiple categories and I have done the Following code which is working fine :

   $collection = Mage::getModel('catalog/product')->getCollection();//my coustom collection
        $categorys_ids = array(1,2,3,4,5);//Array of ids etc 
        if ($categorys_ids != NULL && $collection->getData()!= NULL)
            {
                foreach ($collection as $product) 
                {
                        $categories_pd = $product->getCategoryIds();                              
                        $product->setCategoryIds(array_merge($product->getCategoryIds(),array($categorys_ids)));
                        $product->save();
                }
            }

Now the main issue is that when I assign set catgeory id for the products it takes a lot of time. I have 200 products and this takes upto two minutes or so.. which is alote of time.

I was wondering if there is a way that I can assign categories to products array instead of assigning products to categories or some thing that can be optimized and take less time.

Thanks guys any help is appricated :)

asked 2 mins ago

user3800660

1