I like the ease with which the shape of a space can be modified and the overall functional nature of the design. Unfortunately, the calculations hung before providing me with the results...or maybe I am just too impatient?

Are the calculations run in the browser or server-side?

About how long should a person expect to wait...and I understand that they could take longer than internet expectations?

Hmm, my testing has been a bit bad... It should take about 5-30 seconds, depending on your machine.

It uses a web worker to do the calculations, so it shouldn't hang until it starts plotting stuff.

What OS + browser are you using? I noticed that it doesn't work on Opera, for example. But on chrome it works decently even on my phone.

Most of the calculations are done client-side, the server-side calculations only take a few seconds.

I'm using Chromium. I suspect that it is the response time that makes me perceive the site as not working...even 1 second is a long time for something that appears to be interactive.

The fast response time of the room editor probably sets an expectation. One strategy that may be used to mitigate long response times is to update the screen so that the user sees progress.

Here, though, the calculation makes the page unresponsive to ordinary events like scrolling.

Thanks for the feedback, good point. That must be plotly plotting the room modes. I don't really know how to make that not jam up the browser... I'll look into it.