I'm trying to learn JavaScript

That is what I wrote so far:
https://jsfiddle.net/Nikita_Sadkov/4h72j5s6/

>>49
GC is a very costly operation since it invalidates all caches and stops the program dead.

That is why I have invented Symta, which has no GC, allowing real-time software to run very smoothly, but still supporting circular links, compared to reference counting.