I don't believe that's the way QV10 multithreads scripts. What it does is use many cores to resolve expresions or formulas but it won't change the sequence things are being done or something like that.
i.e. if you're doing something like
right(FIELD1,2) AS FIELD1,
left(FIELD2,2) AS FIELD2
QV will now use separate threads to resolve each expression faster but will not start to process anything else until it's done with that load.
Only thinkg that will make sense changing is avoiding functions that will not multithread, although I wouldn't really know what those are.