If you wanna nitpick, at least GCC doesn't use a separate preprocessor binary anymore, the preprocessor is integrated into the compiler binary. You're of cours

If you wanna nitpick, at least GCC doesn't use a separate preprocessor binary anymore, the preprocessor is integrated into the compiler binary. You're of course correct in that preprocessing and template resolution are separate steps in the compilation process, but his underlying point still stands, namely that a large reason why C++ compilation is slow is the need to include reams and reams of code.