> some of the JavaScript engines, most notably MicroSoft's JavaScript Engine, use reference counting for determining when memory can be freed.[1] Interesting,

> some of the JavaScript engines, most notably MicroSoft's JavaScript Engine, use reference counting for determining when memory can be freed.[1] Interesting, I was unaware of this. How does Microsoft's JavaScript engine deal with cyclic data structures, which reference counting can't deal with? The best I understood from your link is that it just leaks cyclic structures? Does the JS spec really allow this? > So it's too early to tell if espruino would fit real time systems. It's too early to tell but IMO it's a critical aspect of microcontrollers. Many if not most microcontroller applications have some degree of real time requirements, which limits your choices for software runtime systems.