Re: closure vs metatable speed & memory use

[Gaspard Bucher <gaspard@...>]

I updated the tests to compute a sum with a global value involved (should prevent empty loop optimization). Here are the new results, closer to what Mike said about metatable based implementations beeing faster (the tests also run 10x more loops then the previous test).

implementation	Lua memory	LuaJit memory	Lua speed	LuaJit speed
closures (no self)	95.6 Mb	62.6 Mb	11’821 ms	355 ms
metatable	40.4 Mb	29.8 Mb	17’004 ms	323 ms

Cheers,

Gaspard

On Sat, Nov 27, 2010 at 12:57 PM, Mike Pall <mikelu-1011@mike.de> wrote:

Gaspard Bucher wrote:
> From your comments, I understand that I should use the metatable approach
> since LuaJit can do more optimizations on them and memory usage is lower, is
> this correct ?

Yes.

--Mike