There is a wide variety of elements that determine how fast or how slow your blog will load. Some of the ones that you have a more direct control over include the blogging platform that you are using, your hosting provider and how well-optimized your theme is. The loading time of your website has a big impact on user-experience and on SEO as well (your search engine rankings).Read the full article
Site Performance For Webmasters
Maile Ohye gives an overview of site performance.