The render time is fairly fast on most modern browsers on desktop machines (though there's much more variance on mobile devices for some reason). For the most

The render time is fairly fast on most modern browsers on desktop machines (though there's much more variance on mobile devices for some reason). For the most part, it's good enough for the professional mathematicians on mathoverflow.net, where the math can get quite hairy. (I was active there many years ago, and even then the render speed was better than acceptable)