I have a somewhat ordered mess of tests done with
ttcp collected
here. They have a varying level of documentation, but I think you will find some interesting info there.
What ttcp does is that it measures the raw TCP or UDP performance to/from memory. So basically it measures the performance of the TCP/IP-stack+network-device-driver+hardware combo of your system, without inducing any protocol overhead of say a ftp client or similar.
The most interesting is the TCP performance, as that is what most software used for bandwith-intensive stuff like file-transfers uses. This also the top roof in performance you can expect of well/effective written software. For example
smbfs will with larger blocks achieve just about the top TCP scores you get with ttcp.
I have posted some earlier regarding how to use ttcp, which you should find if you do a search on the forum.
Btw, very important to get good performance is to make sure you have good "multitasking performance" - exec.library, VBR, etc should be in fastmem for example if you have an accelerator. It also often doesn't hurt to have a good CopyMem()/CopyMemQuick() patch installed.
/Patrik