When using the SBBSCTRL:User->List menu option, it would take minutes for the
form to fully populate and display (1457 users). It turned out this was due to
a 200ms delay for each open of the data/user.dat file.

I never noticed this problem before, but I went ahead and optimized for this
situation since it was a bit silly to be opening
and closing the user.dat almost 1500 times to get a list of users. This made a
huge difference and the user list appears in about 4 seconds now.

Oddly, this problem does not happen when listing users in the terminal server
or when iterating through them in JavaSciprt (e.g. userlist.js).