[yoz-y]

I have not used these APIs but I wonder whether it is faster to use Safari in private mode with Focus as a blocker, or using focus directly. Afaik Safari compiles the blocker rules into some binary representation and is thus able to apply them really fast. Do Webkit applications have access to similar functionality?

[eridius]

Safari will be faster. Focus uses UIWebView, which is markedly slower than WKWebView (UIWebView executes in-process and cannot JIT, WKWebView executes out-of-process and can JIT and is as fast as Safari).

[st3fan]

I'm sure it is measurably faster. I doubt it is noticeably faster.