GdPerfMonitor VS dialogic

One example where I had to use funcrefs is this little project https://github.com/aleksandrbazhin/GdPerfMonitor - you can pass your own function, which will be called each frame to draw a plot, thus enabling monitoring for anything.

For performance monitoring I made a little project https://github.com/aleksandrbazhin/GdPerfMonitor and use os_time_per_frame() to monitor those one-two frame FPS drops. You can get it in asselib, if it's helpful.

For some context, I'm an experienced (~10 years) programmer starting to dabble in game development. I'm learning to build various systems to gain experience and understanding, and recently I was interested in developing a dialogue system with an editor similar to what Dialogic provides.

https://github.com/nathanhoad/godot_dialogue_manager https://github.com/coppolaemilio/dialogic

Use something like Dialogic or (personal recommendation) Dialog Manager.

I used a Godot plugin called "Dialogic" to create it, still working on the themes and assets, so most changes made are cosmetic.

There are two great dialogue systems available for Godot, Godot Dialogue Manager, which is geared more towards writing things in a script, and Dialogic with a nice user interface, that is more artist-friendly (though direct script editing is also available). It also has more features (at least in the new version, which is currently under development for the upcoming Godot 4 and might not be suitable for production).

Here you go. You should try RC3 with this. https://github.com/coppolaemilio/dialogic/commits/main

Dialogic 2.0 is supposed to be Godot 4 ready (according to github https://github.com/coppolaemilio/dialogic)

For your second question, try looking at existing add-ons like Dialogic either for a ready to use implementation or as inspiration for how to code your own.