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> 	Just out of curiosity, there is a good reason to create two classes of
> variables?


> Why not having a locals table for each function and create
> them at run time? 

Lua local variables are ~3 times faster than global (table field)
variables, without counting the time to create/collect those tables.
Moreover, the "unit" of scope in Lua is a block, not a function (so you
would need several tables for each function...)

-- Roberto