The article mentions SAX parsers and then kinda just moves on and talks a bit about loading JSON with eval. I realize there are other ways of doing things and a fair bit between his two data processing points. My experience with JSON is mostly limited to simple APIs.

Is there a way to handle streaming JSON? I guess it'd be doable in a language like JavaScript where you build up the prototype. Others would probably vary substantially. But I can't say I've tried it yet.