[virgilp]

That's for different source files though, right? Try having a 10Mb auto-generated C++ file, see how fast it compiles, regardless how powerful your computer is.

[fluffything]

No need to autogenerate anything: expand all headerfiles into a .cpp file, and you easily end up with > 10Mb files.

Visual C++ pre-compiled headers is quite amazing and works really great, avoiding this almost completely.