Hi I have a problem with safari. When I want to open a new tab or select the current (CMD + T and CMD + l) is the browser to freeze. Below I attach a recording of the screen. This happens year. Computer repeatedly to format and cleaned the cache, history, etc. Pleas help! 
https://www.dropbox.com/s/957bk1nrocfm311/lag problem.mov?dl=0
https://www.dropbox.com/s/957bk1nrocfm311/lag problem.mov?dl=0