[Vm-dev] A stab at explaining Spur

[Ken.Dickey]

Greetings,

I would think that another option is to replace all the methods in the old class with "updater" methods and flush the method cache(s).  [old selectors, fixup method(s)].

The new version of the class has a new class index.

At any send to an old instance, the updater has access to the calling context and can do the forward to the new intance and re-send the method.

Usual GC cleanup does the rest.

Why did you choose to avoid this strategy?  (or am I just misunderstanding?)

Thanks much,
-KenD