Re: Outline for Guile Generational GC

[Jim Blandy <jimb@red-bean.com>]

I think the write barrier should record intergenerational pointers in
a list.

Setting a bit and scanning at GC time is appealing, but by having to
scan all old generations for pointers to younger objects, I think you
lose most of the advantages of generational GC, since GC again becomes
proportional to the total size of the heap.