If you’re experiencing a slow Magento admin interface try either or both of the following.

Using Magento 1.5ish you may find the following line

Mage::getModel('catalogrule/rule')->applyAllRulesToProduct($productId);

in “/app/code/core/Mage/Adminhtml/controllers/Catalog/ProductController.php”.

Comment it out. You should see a tremendous improvement.

Secondly, you may change the indexing update mode.

1. Log in to admin area.
2. Go to the “Index Management” page through “System => Index Management”.
3. Select indexes you want to change. If you’re unsure, select all.
4. “Change Index Mode” from the “actions” drop down.
5. Selecting this will show another dropdown “Index Mode”.
6. Select “Manual Update” from “Index Mode” dropdown.
7. Click “Submit” button

You will see message like “Total of X index(es) have changed index mode.” This should make adding and modifying products significantly faster. You may no longer have a performance problem.

// CrashMAG