Safari Running slow on OS X Yosemite?

Question

Safari tends to run slow on OS X Yosemite. This happens most of the time when I'm running a Facebook tab (which "whites out") or watching a YouTube video (which is really choppy and "unsyncs" with the audio). The colored pinwheel becomes commonplace and the screen freezes. I thought it would be my internet connection but I've used other browsers such as Chrome and Firefox on the mentioned sites and it works perfectly fine. This problem has happened since I've updated my MacBook to OS X Yosemite back in October. Is this a general problem among all Macs with the latest Safari update Version 8.0.2 (10600.2.5)? If not, what could it possibly be?

Answer 1

  Go step by step by step and test.
1. Power off the router. Unplug it from the wall. Wait a while.
    Plug it back to the wall. Power the router on. Wait until all the lights are lit properly. It will take a while.
    Restart the computer.
    Start up in Safe Mode.
    http://support.apple.com/kb/PH14204
2. Delete Caches.db
    Close all windows and quit all applications.
    Hold "option" key down and click "Go" menu in the Finder menu bar.
    Select "Library" from the dropdown.
    Library > Caches > com.apple.Safari > Caches.db
    Right click the Caches.db file and select "Move To Trash.
    Close windows and relaunch Safari.
3. Empty Caches
    Safari > Preference > Advanced
    Checkmark the box for "Show Develop menu in menu bar".
    Develop menu will appear in the Safari menu bar.
    Click Develop and select "Empty Caches" from the dropdown.
4. Delete Cookies
    Safari > Preferences > Privacy > Cookies and other website data:
    Click “Remove All Website Data”.
5. Safari > Preferences > Extensions
    Turn off Extensions if any and launch Safari again to test.
    Turn on those one by one and test.