New Post: About the speed

HOW TO SPEED UP 3X:

in file SftpFileStream.cs is predefined too small buffer - 4096 bytes is not enought.

ORIGINAL:
_

    internal SftpFileStream(SftpSession session, string path, FileMode mode)
        : this(session, path, mode, FileAccess.ReadWrite, __4096__, false)
    {
        // Nothing to do here.
    }

    internal SftpFileStream(SftpSession session, string path, FileMode mode, FileAccess access)
        : this(session, path, mode, access,__4096__, false)
    {
        // Nothing to do here.
    }_

Change it to bigger, min 65536 or up.

you also have to change buffer size check, to go thru
_

  internal SftpFileStream(SftpSession session, string path, FileMode mode, FileAccess access, int bufferSize, bool          useAsync)

  if (bufferSize <= 0 || bufferSize > __16__ * 1024)
        {
            throw new ArgumentOutOfRangeException("bufferSize");
        }_

It will speed up 3x, but it still about 3x slower than others (I compare to winscp).
It is difficult go deeper.