Funny but rather relevant story, I used to use chrome on my iPhone 6, due to Apple crazy it simply does not run at the same speed as Safari, in fact we have clocked it half as fast. This happens cause you are forced to use webview.
Even at half speed it was still fairly fast and usable
But… I needed to do something about the composer for position fixed bugs in Safari, so forced myself to use it for a bit.
Once I used Safari for a few hours on the iPhone, I simply could not tolerate the artificial slowness of chrome. I simply stopped using it on my iPhone.
Stuff is mainly acceptable to users cause they know no better, once any android user experiences Discourse on a 6s, going back to android will incredibly painful
On iPhone 6 Safari, Discourse perf is excellent, it can be tolerable or fast enough for some android users, but it is never excellent and often terrible
… Composed from my iPhone 6