Performance slows considerably as more questions are added to the map

[paxtonfitzpatrick]

As you progress through questions and accumulate more and more points on the map, the time it takes for the site to (after selecting an answer to the current question) mark the chosen answer as correct/incorrect (red/green), add its point to the map, update the computed knowledge values, and become responsive again grows. At ~100 questions (~40% of "all (general)" domain mapped), the page is unresponsive for ~3 seconds. Could be due to some implementation detail, or something fundamental about how the runtime of the map-updating calculation scales. If the latter and there isn't a straightforward way to make incremental updates to the knowledge values rather than fully recomputing each time, then this should be done asynchronously so it doesn't block the quicker UI changes (coloring answers red/green, progressing if auto-advance is enabled, etc.)

[paxtonfitzpatrick]

I believe this was introduced in the most recent PR, so it's probably not an unavoidable aspect of having to run the calculation for a greater number of points

[jeremymanning]

Unclear if this is a bug or an "opportunity" for performance optimization. Certainly we could run updates asynchronously.

In general:

• Visual feedback after user interactions should be instantaneous (top performance priority)
• Computations should happen asynchronously wherever possible, so they don't block UI updates
• For long computations, instantly display a progress bar or loading animation