Apple have released the WKWebView but last I checked it has a number of bugs/errors that make it very difficult to use.
No page should have so much JS (for ads and such) that without a hyper-fast JS engine it feels like it stopped loading.
IMO, not necessarily. I was playing around with a D3 visualization that ran terribly within the UIWebView, there was really very little I could do about it.
But I won't argue that plenty of sites are overusing JS for rendering etc when they should be leaving that to static HTML.
UiWebView from fb/tw is really the biggest pain point on iOS when most of your traffic come from social media.
The only way I foud to escape it is to add a little bit of js to perform the following :This is tedious, broke the back button and glimps for half a seconds beforebuser can access my content. I will loved to not have to do it anymore.