I Think this method can help you to speed up your safary browser :
Empty your cache. The accumulation of temporary Web files that make your browser load faster will eventually make it slower depending on how many files you've collected. Go to Safari > Empty Cache, and see if that speeds up the browser.
Restart. Just like your hard drive, your browser needs to be rebooted every once in a while. Go to Safari > Reset Safari, which will clean out everything your browser has accumulated, even cookies, for a fresh start. Keep in mind that you'll need to re-enter your usernames and passwords for your favorite sites, but an increase in speed might make the hassle worth it.
Remove add-ons. You may have installed an add-on that you don't even use anymore, and it could be sucking the life out of your browser. Uninstall any add-ons you don't need so Safari can work unencumbered. Just look for the related files in Library/Internet Plug-Ins, and remove the offending add-ons.
Switch signals. Unfortunately, nothing's going to speed up Safari if you are on a wireless network with a slow signal or your service provider is having a bad day. Before you empty the cache, reset Safari or track down add-ons, make sure that the culprit behind your slow Web surfing isn't beyond your control. Contact your service provider if there are any problems, or try your computer on another network.
Try OpenDNS. This free service can help your sites load faster by routing your Internet surfing through its own servers, not through your ISP's servers. As a result, it might be able to bypass problems you're having with your ISP.
Whether the problem lies within Safari or beyond your browser, these tips can help your pages load faster, and you won't be twiddling your thumbs waiting to get at information.