Basic speed optimization question

[Aladdin Lampé <genio570@...>]

Hi all,

In other programming languages, I used to declare objects before loops in 
order not to re-create one at each loop, for instance in Java :
MyObject hello = MyObject.new();
for(...)
{
// use and reuse 'hello' here, without the overhead of recreating the object 
at each loop
}

In Lua, I often do the same:
local a = ""
for ...
 a = ... -- use variable a, change its value, etc. (here variable 'a' is 
'non-local' thus with no indexed search)
end

Would it be better Lua programming (in terms of *speed* optimization) to do 
directly:
for
 local a = ... -- because here the variable 'a' is local and not 
'non-local', thus very quickly resolved (indexed) even if recreated at each 
loop
end

Thank you for your thoughts and comments about it!
Genio

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