I have tried to clean up things, and I noticed that when I turned off the three following launchd processess, with the free utility Lingon, at least it appeared to run marginally faster.
- Start Lingon (google Lingon downloads).
- Find the processes listed below in the lowest three groups in Lingon's sidebar.
- Select, Disable, Save, and Confirm with your Administrator password for each of them.
com.apple.RFBEventHelper com.apple.RFBRegisterMDNS_ScreenSharing.server com.apple.RFBRegisterMDNS_RemoteManagement.server
[crarko adds: I haven't tested this one. I use Screen Sharing all the time. I notice that the current version of Lingon has moved to the Mac App Store.]

