The performance of your website depends on many aspects:
1.Hardware on which your website and database server are running.
2.Available system performance when you're sharing system resources with other applications (relevant in a shared hosting environment).
3.Amount of documents on your website.
4.Complexity of the website (number of nesting levels, number of web parts on a page, etc.)
5.Custom code added to the website.
6.Use of caching.
7.Other special circumstances, such as network connectivity between web server and SQL server, etc.