> FWIW none of the dumping mechanisms work with the new garbage collector,

Interesting!

Is there something I could read about your new GC?

I'm asking because I once also had plans to rewrite Emacs' GC (to be incremental and generational).  But hat was >20 years ago, and it never took off because the algorithm I used was patented.  Which it no longer is, I think.

CC'ing Stefan because he reminded me of this, recently.