3 ms·

Right but are those call sites typically monomorphic (i.e. devirtualizable?)

• jonhohle 9y ago
  const type field in the base class, non-virtual accessor (direct field access can be inlined). Memory vs CPU, the usual trade off.
  • euyyn 9y ago
    It wouldn't cost memory though, because you free up a slot in the virtual table. No?
    • jonhohle 9y ago
      Virtual table should be one per class. A type field would be once per instance.
      • euyyn 9y ago
        Ah, right, static fields in C++ can't be overridden. If they could, they could be implemented by stuffing them in the virtual table and the cost in space would be O(classes) instead of O(instances).
    • deleted 9y ago
      [deleted]
• CJefferson 9y ago
  Often they become so after inlining.