Yes the performance works fine in safari (as well as expected), as does it in DPS classic. The last two editions of WIRED UK for both tablet and phone are HTML, https://itunes.apple.com/gb/app/wired-magazine-uk/id400701660?mt=8I can share them with you if you want.I have an idea that the custom Nav (that currently does not work in the publish environment) is causing an issue leading to excess render time (not loading time). I am planning to make a new version of the app that does not have this f...