I have found Clang's -ftime-trace flag helpful in finding bloated #include-s and templates. Also, I have analyzed the .ninja_log file (for CMake+Ninja) to find

I have found Clang's -ftime-trace flag helpful in finding bloated #include-s and templates. Also, I have analyzed the .ninja_log file (for CMake+Ninja) to find slow-to-compile .cpp files.