C++ supports this via the mutable keyword https://stackoverflow.com/questions/105014/does-the-mutable-keyword-have-any-purpose-other-than-allowing-the-variable-

C++ supports this via the mutable keyword https://stackoverflow.com/questions/105014/does-the-mutable-keyword-have-any-purpose-other-than-allowing-the-variable-to https://stackoverflow.com/questions/105014/does-the-mutable-... though not particularly for performance purposes.