Re: Performance overhead using __index?

["Posti Laatikko" <postilaatikko2002@...>]

I like to clarify what i mean was overhead using variables & functions using metatable __index OOP method.

 

something like

 

acc = Account:new()

 

-- how much performance overhead i get with something like this

acc.Balance = 100

acc.Withdraw(10)

 

 

Also like to know if using LuaJIT overhead between these two methods lowers? Because like to use best possible method performance wise in my whole code because i'll be using objects alot.

----- Original Message -----

From: Posti Laatikko

To: lua@bazar2.conectiva.com.br

Sent: Monday, October 10, 2005 10:33 AM

Subject: Performance overhead using __index?

I was wondering how much performance overhead is there when using metatable __index?

Meaning how much slower it is to use metatables + __index?

 

I plan to use this

 

function Account:new (o)
      o = o or {}

      setmetatable(o, self)
      self.__index = self
      return o
end

or this

 

function Account:new (o)

    o = o or {}

    Table.Copy(o, self) -- copies self to o

    return o

end