for me anyway, and my Safari experience was pretty awful! a fair few peeps been complaining of Safari more often than not being slow. sluggish. failing to cache properly and not rendering or scrolling image heavy pages. As i say, i suffered so much of the time with it. needed a fresh re-start of the app, then it quickly started up again. in this thread - http://forums.macrumors.com/threads/safari-on-ipad-pro.1954800/ - i noticed the people who generally didn't suffer these issues were those with ad blockers installed. i always thought, as did others here, ad blockers would further impede performance if anything. so out of interest i installed 'Purify' (minimal fee) and activated it. just to see what would happen. and Wow. All Safari issues solved. I've done a good amount of heavy and continuous testing with a mass of image heavy sites and a ton of other apps open simultaneously and nadda. zip. super silky smooth Safari all the way through. haven't yet had a single slow down or re-start. Obviously there's crappy hidden end code in a lot of these sites slowing things down that an ad blocker filters out (and a lot of the sites i visit don't support ads in the first place). I recall my desk top browser, Firefox, also had a performance boost when i activated an ad blocker too. some sites must contain a load of hidden rubbish that really impede browsers sometimes. So my advice - install an ad blocker!