> They do boost performance on SMP (because you can have N (N=3Dnr. of CP=
> Us)
> threads serving data).

Depends on memory bandwidth, caches, locking overhead and a million other
issues. 

> >  on keeping it single-threaded - unless someone can tell me that's a =
> bad
> >  idea)
> 
> Keep it single threaded if you run on UP only...

Theory - SMP needs threading
Practice is generally a little different


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