Re: Pushing a UserData pointer?

[Chris Marrin <chris@...>]

Mark Hamburg wrote:

> This is more or less the way I ended up doing object pushes from
> Objective-C. The one enhancement I came up with was to use a light userdata
> instead of a pointer to get to the table.
>
>     lua_pushlightuserdata(L, kObjectsTableKey);
>         // kObjectsTableKey just needs to be a unique pointer
>     lua_gettable(L, LUA_REGISTRYINDEX);
>     lua_pushlightuserdata(L, this);
>     lua_gettable(-2);
>     lua_remove(-2);
>
> Still not exactly cheap.

That's what I was doing originally. When I moved to the "hack" version, 
I doubled the speed of my test cases. It's not surprising. Looking at 
the two table lookups, I was having to go through a couple of hundred 
statements. Implementing lua_pushuserdata() dropped that down to about 8!

Still a long way to go, but I'm getting closer. Thanks for the 
suggestions...

--
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