If you use the Visual C++ compiler on Windows, vcperf is worth a look: https://github.com/microsoft/vcperf - comes with VS2022, or you can build from github.
I've used it with projects generated by UBT and CMake. I can't remember if it provides any info that'd let you assess the quality of build parallelism, but it does have some compiler front end info which is pretty straightforward to read. Particularly expensive headers (whether inherently so, or just because they're included a lot) are easy to find.
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If you use the Visual C++ compiler on Windows, vcperf is worth a look: https://github.com/microsoft/vcperf - comes with VS2022, or you can build from github.
I've used it with projects generated by UBT and CMake. I can't remember if it provides any info that'd let you assess the quality of build parallelism, but it does have some compiler front end info which is pretty straightforward to read. Particularly expensive headers (whether inherently so, or just because they're included a lot) are easy to find.
Also Incredibuild. The free version is probably good enough to visualize your build and see any bottlenecks.