Re: lua in high performance apps

[Steve Dekorte <steve@...>]

Joshua Jensen wrote:
> 1) Local variables are very quick, since they are accessed by index.  If
> possible, make global variables local (weird, eh?)...
> This technique can also be used for functions...

I just got around to playing with this and it works great.
For example this code:

  local i, v = next(t, nil)
  while i do i, v = next(t, i) end

Is 10% faster if you make "next" a local:

  local next = next
  local i, v = next(t, nil)
  while i do i, v = next(t, i) end

I also did some other tests and found that foreach() is ~20% faster than 
the equivalent while loop, while foreachi() was ~20% slower than a while 
loop.

Steve