Hmm, interesting point. I've never worked on a truly large JavaScript codebase; it would be interesting to test the effect of implicit and explicit termination

Hmm, interesting point. I've never worked on a truly large JavaScript codebase; it would be interesting to test the effect of implicit and explicit termination on various JavaScript engines. Presumably the performance penalty would apply to traditional interpreter-style engines much more than to modern compiling engines like V8.