I'm new to game engines, but not software development. I've gone through the series of the latest official Godot tutorial videos. I started going through .tscn, .gd, and .project files to see what was in there and how it was organized. I'd like to know more about Godot. I'm not sure what it is exactly that I'm looking for. I think it's "technical documentation".
I'm interested in knowing how Godot organizes and actually does all the calculations between frames. How does it keep track of which methods/functions need to be called? Does it first go through all the signals that exist to see if any are active and a function needs to be called? Or does it go through each script for each instance of each scene and see which functions need to be called that time?
I'm not asking for anyone to explain this to me, but does this information exist anywhere? Or should I just start going through the code and trying to figure it out? I've tried searching, but I can't seem to find this.