Depends on the platform and the build type. For example, on macOS in debug builds, the compiler and linker are reasonably fast, but then 2/3rds of the compilat

Depends on the platform and the build type. For example, on macOS in debug builds, the compiler and linker are reasonably fast, but then 2/3rds of the compilation time is spent in "dsymutil", presumably chewing through megabytes of the debug info.