Latency and availability are common performance problems that content delivery networks can address. However, other performance management tools are also important:
Contrary to what some site owners believe, a CDN is not a standalone performance solution. You need to bear in mind that, in the ecommerce and SaaS worlds, two of the most common performance pains are third-party content and server-side processing. Your CDN can’t help you with those.
Check out the full post, 11 Questions (And Answers) About Content Delivery Networks and Web Performance, from Web Performance Today.