Re: GC "survey"

[John Belmonte <jvb@...>]

I have little interest in a generational collector.  It's going to add 
complexity for uncertain return.  It won't help graphical applications 
that have to meet a hard video frame deadline (such as when doing 
interlace video with only one output buffer) very much.  (Or perhaps not 
at all, now that I see this talk of needing an "occasional" full gc even 
with a generational collector unless you do some programming acrobatics.)

What I'd like to see is for the authors to do the exercise of adding a 
real-time write-barrier type gc to Lua.  Now, I'm not suggesting that 
this become the default, because such a gc, although it will reduce 
worst case gc times, will increase program execution time.  Rather, from 
the exercise, we can gather how to make the gc framework general enough 
to support both mark-and-sweep and real-time collectors, and discover if 
this generality can be done without hurting Lua's current performance. 
Of course, the game people will also gain a useful gc in the process :-).

-John



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