Re: Possible enhancements for Lua 5.2

[Andre Leiradella <andre@...>]

On 26/06/2011 21:27, GrayFace wrote:
> On 26.06.2011 8:35, Andre Leiradella wrote:
> > When writing bindings I usually get the key string in 
> > __index/__newindex metamethods and compute some hash with them which 
> > then I use in a switch. It would be nice if I could save the time 
> > spent in computing this hash since Lua already has one.
>
> How about a table to map needed keys to switch indexes?
If you're suggesting using a Lua table, there's the lookup cost 
associated with retrieving the switch index. If you're suggesting using 
a hashtable other than Lua's, there's the cost if computing the hash 
*and* the lookup cost.

Like I said before, I already have a solution that is computing a hash 
of the string and using it in the switch. What I'm looking for is 
someway to use a hash that's already computed and save some cycles from 
my binding code.

Cheers,

Andre