As we talked about on IRC yesterday, I had hoped to employ the fast become discussed in 

to bring faster proxy loading untill Spur arrives.

Sadly, it's not present in any current VM's, for reasons unknown*.

Luckily, the alternative proposed by Levente in the original thread (http://forum.world.st/A-trick-to-speedup-become-but-not-becomeForward-tp3707064p3708128.html) is appropriate for our case.

As I don't have write-access to Voyage repo, I've attached the package with the changes (which work in both 3.0 and 4.0, but I assume not older, due to using the SlotBuilder for anon subclasses)

The package comment contains a workspace doit for comparision, but long story short, for objects covered by the new fast path, you can now materialize more than million objects in the time it previously took to materialize five.

Cheers,

Henry