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Yeah.
#define WIN32_LEAN_AND_MEAN

Kicks out a lot of stuff, like networking and multimedia. Don't mix it with PCHs, though.

That's odd. It's been a long time, but I remember a Win32 hello world compiling in less than a second, on a 600MHz computer.

GCC supports PCHs since 3.4.


But, windows.h taking long? It's an extremely straight-forward C header. Big, yeah, but quick to parse.