Site access speed is too slow? How to upgrade?

　　I think people like me should be a lot, for waiting more than one second are busy, especially anything on the Internet this fast-changing world, the site is slow to open, simply can not be tolerated, usually it is 1 second directly open, which only recently opened the site a few seconds to open, and even many seconds are not open, network status also no problem. Why is this situation?
　　iis7 website monitoring
　　test DNS pollution detection, speed detection site opens, whether the site was hacked and other factors.
　　Garbage problem, because the computer too long without cleaning up, too much garbage cause the page to open very slowly, garbage clean-up tool can be used to clean up.
　　dns problem, usually because of network problems dns, dns repair method is to use tools to repair open
　　in the upper right corner of the search after "preferred dns", and open the download is complete, click Start, click after the "preferred dns" preferably completed "enable NOW".
　　Cache clear, because too many browser cache, open the browser, click "Tools", "internet" option, "Delete" in the Browsing History, click a column, click again to "Delete" and restart the browser.
　　Thus, for a simple problem, to think and try to solve the multi-angle may get good results oh.