Re: Ruby?

[Luiz Henrique de Figueiredo <lhf@...>]

>Please could you explain why local variables are so much faster than
>globals.

Globals need a table look-up. Locals are indices into the stack.
Here is the relevant section of lvm.c:

      case OP_GETLOCAL: {
        *top++ = *(base+GETARG_U(i));
        break;
      }
      case OP_GETGLOBAL: {
        L->top = top;
        *top = *luaV_getglobal(L, kstr[GETARG_U(i)]);
        top++;
        break;
      }

--lhf