Re: Local Variables

[Roberto Ierusalimschy <roberto@...>]

> So recently I found out that local variables are always faster. So I
> have two questions, when would you ever need a global variable, and
> why would Lua make all variables global by default if you use local
> way more often? It seems to me that I could just declare a variable
> local right off the bat so it has the same scope as if it were global
> (I feel like there has to be a difference in scope that I just don’t
> know about).

1) Local by default is a mess.

2) You do use a lot of globals in Lua. If you write

  print(string.len(str))    --<< 'str' is a local variable

you are using two globals and one local.

-- Roberto