While many blaim Magento for being slow, it is possible to make the Magento e-commerce application lightning fast. This requires first of all funding, because you will need to add sufficient system resources (CPU, memory) to Magento to make it run properly. But it also requires time and knowledge. For the last part - knowledge - this list helps you further.

Read more: Magento Site Performance Optimization

Compression is one of the tricks to gain performance with any website. So the same applies with Magento. However, the general rules that you can find on the Internet to compress output through Apache mod_deflate are very general, or even wrong when used in combination with Magento Downloadable Products.

Read more: Compressing Magento output