The dispatch part of the code snippet looks to me like what you would also get with computed gotos. Something like goto instruction_labels[++pc]. So that should

The dispatch part of the code snippet looks to me like what you would also get with computed gotos. Something like goto instruction_labels[++pc]. So that shouldn't be the difference, compilers can compile this well. As for whether this is "threaded", and exactly what kind of threading it is, there is widespread confusion and abuse of terminology. https://en.wikipedia.org/wiki/Threaded_code https://en.wikipedia.org/wiki/Threaded_code