Thanks, guys, for the timing tests. One of the 'disadvantages' of only having a single device, and being only one person, is to never be 'confident' that what works for me, will also work for other people. I rely on others to 'kick the tires' for me beyond what I have done

skatebiker, since I use the 'PyEphem' Python library (totally amazing), I have no choice as the the 'accuracy' of the calculated results. All in all, I think I am willing to settle for a slightly slower speed that this might generate. As well, I am not sure how much of the (lack of) speed is due to that, to using Python (which is 'scripting' language, and not 'compiled' like 'C' would be), or to the use of 'Cairo' to generate the graphics. If and when I purchase the next tablet device (N900), I am very much hoping that it will be MUCH faster. One of the things that I wanted to do was to generate a '3d globe' of the Earth using Python on the N800, but my tests show that it would take almost 1.5 *minutes* to do so -- which is way too slow.

P.S. Those Javascript astro pages are neat! You had never mentioned that you were also creating stuff like that!