The only thing you will gain from an "alternate" library is the time spent hiding/showing the mouse as that has been removed. That gain won't help at all really. PUT/GET use string management to store the image data, so just getting the address is wasting cycles, as it has to fetch the string descriptor first, then fetch the address from that. Then checks the length for zero, then more time wasted checking if the coordinates fall inside the screen dimensions etc. It is BASIC after all.