Setting options to minimize processor usage
You can set several client options to reduce the time that is required for client processing tasks and improve performance. The client options to consider are quiet, virtualnodename, ifnewer, incrbydate, and tapeprompt.
For Mac OS X file systems, limiting the length of extended attributes can help improve the client performance.
For clients on any operating system, turning off antivirus programs, or other programs that compete with the client for system resources, can also improve client performance.