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.NET Forum / .NET Framework / New Users / July 2006FileStream & MapViewOfFile comparison
I need to access big data in a readonly fashion. I was thinking to open a FileStream and seek and read as needed. I was wondering if it was worth doing my own FileStream class which would use internally use MapViewOfFile internally? Or pehaps a purely managed wrapper which, at least, load the bytes in 4k memory buffer (and update the buffer everytime I move)? Lloyd, >I was wondering if it was worth doing my own FileStream class which would >use internally use MapViewOfFile internally? Have you seen the UnmanagedMemoryStream class in .NET 2.0? It may save you some work. There's also a file map helper class available here http://www.winterdom.com/dev/dotnet/index.html Mattias  SignatureMattias Sjögren [C# MVP] mattias @ mvps.org http://www.msjogren.net/dotnet/ | http://www.dotnetinterop.com Please reply only to the newsgroup. >I need to access big data in a readonly fashion. > I was thinking to open a FileStream and seek and read as needed. > I was wondering if it was worth doing my own FileStream class which would > use internally use MapViewOfFile internally? Most likely, no. The file system already does read-ahead buffering and generally will do a better job of managing the memory than you can do in your application. Unless your needs are very unusual, it's best to just use the OS-supplied file buffering - which FileStream will use since it's just a simple wrapper over the Win32 file I/O operations. -cd thanks! >>I need to access big data in a readonly fashion. >> I was thinking to open a FileStream and seek and read as needed. [quoted text clipped - 8 lines] > > -cd
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