Slow performance on the calculator is not normal. I’ve gone to a lot of trouble to make sure it always runs quickly. Once the calculator has finished downloading, it runs on your computer just like any other desktop application. The fact that it runs from within your web browser doesn’t matter. It is still running on your computer. The performance of my servers has nothing to do with it.

The power system and airplane charts take the longest to run, but I’ve never seen them take more than one second on my computer. If you don’t care about the real-time charts in the analysis that you are doing, then just select a different chart that won’t need to be updated with every data edit. For example, display a location chart.

Other than that, my advice is the same as for any other situation where a program runs slowly. Install the latest system patches, don’t run applications in the background, reboot, etc.