You're right, the issue comes from polymorphism, and from use of polymorphic values when the specific class cannot be determined statically. But this is sort of

You're right, the issue comes from polymorphism, and from use of polymorphic values when the specific class cannot be determined statically. But this is sort of the point of polymorphism, can't do much about it, except maybe caching the looked-up value(s) when looping over a polymorphic collection. Overriding may lead to other troubles though [1]. [1]: https://www.snopes.com/fact-check/shoot-me-kangaroo-down-sport/ https://www.snopes.com/fact-check/shoot-me-kangaroo-down-spo...