I shared 192 folders, with 277 files. (I shared the compaq recovery drive, lots of folders with one or two files.)

Threads:
XoloX uses 1 thread (temporarily) for indexing, 1 thread (also temporarily) for writing changes to the files, 5 threads for interface, web integration, main program execution, etc, plus one thread per shared directory and sub directory. So the more organized you are with your archiving, the more threads it's going to use. :P What's worse, is that every time there is a change to a directory (If you add or delete a file, or complete a download) XoloX kills ALL the threads then opens them up again, rebuilding the index for the directory that changed. So the less organized you are with your archiving the longer it will take upon modifying a directory. :P

XoloX terminates the threads for directories that are unshared while running.

Memory usage:
pending further re-investigation for v1.11 ...


Utilities used:
Sysmon -- Comes with windows, check Programs -> Accessories -> System Tools.
Another Task Manager -- http://atm.rm.it (you can use taskman in Win2K/XP)
Ollydbg -- http://home.t-online.de/home/Ollydbg