title: Read with File Mapping Objects in C++
body: <p>I am trying to use Memory Mapped File (MMF) to read my .csv data file (very large and time consuming).</p>
  
  <p>I've heared that MMF is very fast since it caches content of the file, thus users can get access to the content in disk as in memory.</p>
  
  <p>May I know if MMF is any faster than using other reading methods?</p>
  
  <p>If this is true, can anyone show me a simple example how to read a file from disk?</p>
  
  <p>Many thanks in advance.</p>