Yeah, and that's becoming quite an old thread (2015), yet the most recent comment is from Nov 2016, and if you read backwards from there it's a pretty strong indicator that the issues are still extant. It's a real PITA. My soon to be replaced (but I like the small form factor a lot) iPhone 5S from 2013 whups the ass off my OnePlus Two from early 2016 when it comes to JS and canvas rendering performance.