Re: Closure-based objects and JIT compilation
- From: Justin Cormack <justin@xxxxxxxxxxxxxxxxxxxxx>
- To: luajit@xxxxxxxxxxxxx
- Date: Sun, 3 Nov 2013 13:11:21 +0000
On 3 Nov 2013 12:11, "Aleksandar Kordic" <alexandarkordic@xxxxxxxxx> wrote:
>
> Hi,
>
> While testing Closure-based object system [1] approach I have noticed
> that creating new set of functions for every new object stops JIT
> compiler optimizations because each object has its own function
> instances that do share the same code but have different upvalues.
>
> Do I need to avoid upvalues ? What are the best techniques for
> associating data to functions ?
>
You don't need to avoid upvalues but yes you need to avoid creating
closures in performance critical code. Best thing to do is use Lua's :
notation and pass the data, and/or use metamethods on ffi types.
>
> [1] http://lua-users.org/wiki/ObjectOrientationTutorial
>
> --
> Kind Regards,
> Alex
>
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