Visitor is traffic. Lots of visitors, then there will be lots of traffic. How we can balance this by having other than a high performance server, load balancing, content delivery network and all? In other way, the least we can do is to improve the website itself to the highest optimization where the site can load in a very short time of second, or less. Herewith, we present to you 20 selected website for checking speed and performance of a website.