But then you are looking at the wrong thing: You are no logger profiling/debugging Javascript but the Javascript runtime. Those tools do tell you the Javascript part, why do you say "superficial"?
What is missing there, I can see how long each function took, even more so when I combine it with the flame chart?
I assume you are still talking about the Javascript part. What the C++ based subsystem does can be examined using tools for that language on the respective platform.
Example (memory profiling with heap snapshots): https://developers.google.com/web/tools/chrome-devtools/memo...
Profiling functions (V8, Chrome, using the CPU Profiler): https://developers.google.com/web/tools/chrome-devtools/rend...
What is missing there, I can see how long each function took, even more so when I combine it with the flame chart?
I assume you are still talking about the Javascript part. What the C++ based subsystem does can be examined using tools for that language on the respective platform.