Magento has a built-in cache. In version 1.5.0.1 Magento added a Full Page Cache option to Magento which gives us the ability to use holepunch techniques to cache blocks. This section here doesn't deal with the full page cache at all, rather just uses the standard Magento cache and we add the ability for Magento to cache category lists. In this short howto, we show you how to leverage this cache to speed up your category lists.