What goes into the *.exe and what goes into the *.assets?

Unity Services
1

When building a project containing several scripts, sprites, scenes, etc. what exactly goes into the .exe and what goes into the .assets files?
For instance, are all scripts compiled into the .exe and all sprites into .assets files? Or scripts files also go into .assets? Or is this not deterministic?

I would like to have my build output a full game and a demo depending on a pre-compiler directive. Let’s assume that only scripts will be different between demo/full game. Would the only difference between the two builds be the exe?

PS: This is more of a general build question than a cloud build question but I figure the build-savvy people probably hang out in this part of the forum.

2

Unity3D compile only the used content of the build setting. On my project, there is 2.5GB but when compiled the compiled game use 254MB.

3

Nothing is compiled into the executable; it’s the engine that runs the content and is the same for all builds.

–Eric