Are these the best examples for C++ memory mapped files and rapid in memory processing?

Let me know what you think of these:
http://msdn.microsoft.com/en-ca/library/windows/desktop/aa366551(v=vs.85).aspx
http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2006/n2044.html
http://stackoverflow.com/questions/10839747/istream-vs-memory-mapping-a-file
http://stackoverflow.com/questions/10836609/fastest-technique-to-read-a-file-into-memory
http://www.linuxquestions.org/questions/programming-9/mmap-tutorial-c-c-511265/

Are these any faster than the ones I will list for .NET C#. I know C# will be much easier to maintain