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What is the fastest way to get only pre-processed source code using MSVC?

I am trying to find the fastest way to get the complete pre-processed source code (I don't need any other comments, only the source code) for the C source file.

I have the following small test program that only includes the Windows ( mini.c) header file :

#include <windows.h>

Using Microsoft Visual Studio 2005, I run the following command:

cl /nologo /P mini.c

It takes 6 seconds to create a 2.5 MB mini.i file; changing it to

cl /nologo /EP mini.c > mini.i

(which skips comments and #line information) it takes just 0.5 seconds to write 2.1 MB of output.

Does anyone know of good methods to improve this even more without using precompiled headers?

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The / P option has been around for several years, it creates the .i file and does not have any object file.

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Source: https://habr.com/ru/post/1781471/

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