Profiling Compilation Process possible? (long compilation times)

Hi,

My project takes too long to compile.

Things i've tried:
1) Incremental compiler (was extremely buggy for me / its still in preview)
2) Convert C# scripts into Assembly Definition Files (had no effect on compilation time)
3) Remove Library folder, and let Unity rebuild (had no effect on compilation time)
4) Deep Profile + Editor Profile to see what's eating the most time during the compilation process - but this gave inconclusive results, sometimes Profiler would show the number of seconds it took, but only display one line in the Overview tab, like

Code (CSharp):

1. NumberBuffer.PackForNative()
2. OR
3. Buffer.Memcpy()
4. OR
5. Char.IsLatin1()
6. OR
7. Number.MatchChars()
8. OR
9. StringBuilder.ctor()
10.  

Target platform is Windows.

Any suggestions how to see what is eating most of the compile time, so i can try removing such parts from the project? The project is quite big, with lots of dependencies, so just "testing" removal of different parts (like different 3rd party packages) would take a while.

 

Firstly, thank you for the feedback @MartinTilo !
1) Unity version i'm using: 2018.1.6f1
2) BuildReporter API & Profiler.enableBinaryLog - new to me, sounds awesome, will try this to profile the build process.
3) asmdef - I've created asmdef files, yes, but not 1 per 1 C# script file, more like "1 per related folder structure full of C# script files". Then each 3rd party plugin has one too, etc. Structured it so that there are no cyclic dependencies or duplicate references, you know, the lot. Haven't converted 100% of the codebase, maybe 70%-80%. It might have helped a "little" (10% speed increase? If any. Hard to say.).

I might have over-exagurated a bit saying it takes "too long", its about 5 seconds to enter PlayMode, then up to 5 seconds to get back to EditMode. I'm doing some fast prototyping now, and it got a bit annoying. I still want to find the culprit tho, find out what's taking most of the time and optimize (also for the future, hoping to learn something here, so i know where to look when it increases further).

 

@_watcher_ Did you find any solution to compile time ? I have same problem

 

Hey, Incremental compiler has been deprecated.
Read here: https://forum.unity.com/threads/unity-incremental-c-compiler-deprecated.523993/
I have not tested 2018.3, so maybe you want to test there. And no i haven't fixed the issue myself since i posted what i posted in this forum, but then again, it might be better now in 2018.3. Good luck!