Stub ↔ line of code (for function), indexed by __line number & VariableType

aka Stubs

References

1. Polymorphic ↔ Code call with different Type & gets Stub for each combo

2. Monomorphic ↔ Code always call with same Type, gets one Stub

3. hot ↔ Stubs run a lot, repeatedly

4. warm ↔ Stubs run a few times