Is PythonService Slow, Or, Is It The Code?

[John Abel]

Using medusa, I've written a simple FTP server to run on my Win2000 
machine.  I have two versions, a Win32 service, and the other is 
launched from the command line.  I've noticed, that the Win32 service is 
drastically slower than the command line version.  As a test, I ftp'ed a 
148MB file from one machine to another (connected via a twisted cable, 
at 10Mbps).  Using the service, the file transfered at 31kb/sec; with 
the cli version, it transfered at 549kb/sec.

Has anyone any ideas as to the huge performace difference?

Thanks

John

Here's the code for the Win32 service.  The cli version, is a normal 
medusa-based FTP server, using the same Win32 Auth code as the service.

Win32 Service:

    def __init__( self, args ):
        win32serviceutil.ServiceFramework.__init__( self, args )
        self.hWaitStop = win32event.CreateEvent( None, 0, 0, None )
       
    def SvcStop( self ):
        self.ReportServiceStatus( win32service.SERVICE_STOP_PENDING )
        win32event.SetEvent( self.hWaitStop )
       
    def SvcDoRun( self ):
        logFile = logger.file_logger( 
"D:\\Scripts\\LogFiles\\FTP-Xfer.log" )
        ftpServ = ftp_server.ftp_server( Win32Authorizer(),
                                            port=21,
                                            logger_object=logFile )
        timeout=5
        map = asyncore.socket_map

        while map:
            retCode = win32event.WaitForSingleObject( self.hWaitStop, 500 )
            if retCode == win32event.WAIT_OBJECT_0:
                break
            asyncore.poll(timeout, map)

       
class Win32Authorizer:

    def authorize (self, channel, userName, passWord):
        self.AdjustPrivilege( ntsecuritycon.SE_CHANGE_NOTIFY_NAME )
        self.AdjustPrivilege( ntsecuritycon.SE_ASSIGNPRIMARYTOKEN_NAME )
        self.AdjustPrivilege( ntsecuritycon.SE_TCB_NAME )
        try:
            logonHandle = win32security.LogonUser( userName,
                                                   None,
                                                   passWord,
                                                    
win32con.LOGON32_LOGON_INTERACTIVE,
                                                    
win32con.LOGON32_PROVIDER_DEFAULT )
        except pywintypes.error, ErrorMsg:
            return 0, ErrorMsg[ 2 ], None
       
        userInfo = win32net.NetUserGetInfo( None, userName, 1 )
       
        return 1, 'Login successful', filesys.os_filesystem( userInfo[ 
'home_dir' ] )

    def AdjustPrivilege( self, priv ):
        flags = ntsecuritycon.TOKEN_ADJUST_PRIVILEGES | 
ntsecuritycon.TOKEN_QUERY
        htoken =  
win32security.OpenProcessToken(win32api.GetCurrentProcess(), flags)
        id = win32security.LookupPrivilegeValue(None, priv)
        newPrivileges = [(id, ntsecuritycon.SE_PRIVILEGE_ENABLED)]
        win32security.AdjustTokenPrivileges(htoken, 0, newPrivileges)