Re: LuaJIT roadmap 2008

[Jean-Claude Wippler <jcw@...>]

On 1 Feb 2008, at 19:09, Mike Pall wrote:

> LuaJIT 2.x
[...]

Very impressive (as is LuaJIT 1.x btw - works charmingly).

> The LuaJIT 2.x VM operates in four phases:

I have a question for you about this.

There are many cases where I need to call a Lua function from C in a  
very tight loop.  The function is often simple, i.e. "function (r)  
return r.a > 12 end".  Do you expect LuaJIT to be able to optimize  
this well when called a large number of times in succession?  It would  
be grand if this ends up becoming an int comparison (guarded by a  
check, of course).  Let me add that "r" is a userdata object, not a  
table.

Will be doing timing tests later, just wondered how well this scenario  
fits your model.

Thanks for describing your LuaJIT 2.x plans and good luck with getting  
there.

-jcw