We currently have a feature that variables with names starting with sos are transferred implicitly.

This looks like a decent feature but it comes at a cost that all languages need to check if there are variables with names starting with sos, each time when a kernel switch happens. This can be a performance issue, and it makes it a bit difficult to implement language modules since not all languages can check variables easily.

I am wondering if we can disable this feature, and/or replace it with something like

%global myvar

to have explicit specification of "cross kernel" variables.