Safari 9.0/El Capitan freeze/slowdown during page loading
I've installed safari 9.0 and El Capitan on a 2012 Macbook pro. When I type an address into the URL field, Safari starts to load the page, then stops (with progress bar about 10% across the URL field) for about 30 seconds before the page loads. I've deleted all Web data from the Safari privacy preference menu. Any idea about what is happening and how to fix it?
MacBook Pro with Retina display, OS X El Capitan (10.11), Web pages freezes while loading.