Profiling --fdmd-trace-functions

[Paul]

Thanks in advance for any assistance.

As the subject line states I'm just now trying to learn 
profiling. I have a very small program with 1/2 dozen functions 
and would like to see where the cpu is spending the most time.

I've tried this:
ldc2 --fdmd-trace-functions myprog.d

The result is that no 'trace' files are generated....as far as I 
can tell. When I run myprog.exe it generates no errors, runs very 
quickly, and does not do what it previously was doing.

ldc2 --version
LDC - the LLVM D compiler (1.30.0-git-5fd86e5):
based on DMD v2.100.1 and LLVM 14.0.3