Mainly for debugging locally. I use it either to understand which parts of the code will be touched by a certain action or over unit tests to get an overall idea of what values are passed to which parts of the system.

Works well if you need to reproduce a bug and wants to check how did you get to whatever invalid state you are looking into. In contrast, before, I would do the same by adding a bunch of breakpoints and going through the function calls. This is slow, and specially annoying when you have lots of timeouts in your code.

But this is project is very new, I am starting to feel the actual json with the stacktrace is a little bit more useful than the graph itself to peek at the values. In the sort example, this would be https://www.isageek.com.br/javaflame/data.js