We have code allocs now. We could probably give content and chrome their own code allocs, or even one code alloc per window.
Note that this could be a big perf win -- right now we blow away all the generated code chunks extremely frequently (like at least once per page load, any page load, we blow away the whole thing for the entire runtime).
What's the status on this bug? Is it still meaningful? Do we still need it for Fx4?
We have a bug we must fix for ff4 to do it per compartment. We can dup this one.