We have been using PNG images with assets catalog for a certain time in our project and we recently start considering using PDF vectors for small icons and leave banners and complex images as PNG. We have some concerns related performance, quality and building time and we would like to some opinion of other people that already faced this problem.Our main concerns are:- The images can scale at the correct quality (when directly compared with a true vector image, such as SVG, upscaling)- As far as we know XCode will generate PNGs at run time and we are concerned how much that would at on build time considering we are using only small simple images.Aside from that we also found some issues raised by other people on the web some time ago:https://bjango.com/articles/idontusepdfs/Can someone shed some lights on this subject and let us know the benefits and drawbacks of this approach?