úÎwFile range for sendfile. (Simple binding for sendfile() of Linux.  Used system calls: 7 EntireFile -- open(), stat(), sendfile(), and close() 5 - PartOfFile -- open(), sendfile(), and close() AIf the size of the file is unknown when sending the entire file, ) specifying PartOfFile is much faster.    simple-sendfile-0.0.2Network.SendfileNetwork.Sendfile.TypesNetwork.Sendfile.Linux FileRange PartOfFile rangeOffset rangeLength EntireFilesendfile c_sendfilesendPart