Magento page is very slow

Question

I have a Magento shop: www.ihnkenrollen.de

The page itself loads quite fast but as soon as i click on a category on the left, it takes 6-10 seconds to load. Someone told me that the shop uses no index what makes the shop really slow. How can I add an index to my shop? What else could be wrong?

Thanks in advance!

Answer 1

Enable flat Catalog for Category and prodcuts in

System > Configuration > Catalog > Catalog > Frontend

Also add Lesti FPC cache (look to configure it for filters) http://www.magentocommerce.com/magento-connect/lesti-fpc-simple-fullpagecache.html

and edit htaccess file (memory limit, html and files compression, files expiration etc.).