MemoryMapFile

比普通的文件操作方式，更少的磁盘 IO，提高磁盘的操作性能

Name		Name	Last commit message	Last commit date
Latest commit History 3 Commits
IMemoryMapFile.h		IMemoryMapFile.h
MemoryMapFile.cpp		MemoryMapFile.cpp
MemoryMapFile.hpp		MemoryMapFile.hpp
README.md		README.md
main.cpp		main.cpp

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