[5_allocate_once_efficiency] Example for `Overriding new on a per-class basis` is missing?

[bat42]

Hello,

from my understanding the "Overriding new on a per-class basis (45:56)" is the important part of [5_allocate_once_efficiency], but the actual example is not build and runnable? Only the "skeleton" was added without usage (no compiling and linking). Seems also that in the talk a live demo (use_arena = true) of "Overriding the global operator new operator (45:04)" was presented? Would it be possible to add a runnable example of "Overriding new on a per-class basis"?

Thanks
bat42