It's a blog post, not a wikipedia article. Andy has a fairly large, already established audience, so being conversational and launching directly into a topic is

It's a blog post, not a wikipedia article. Andy has a fairly large, already established audience, so being conversational and launching directly into a topic is fine, as is including a picture if he wants to (the white space just seems to be a formatting issue due to his skinny template). Even if you hate the image, I'm not sure why a small amount of scrolling rained on your day so much. If you stick with the article for just a minute you get plenty of context, and if you're still confused, there are a ton of links in there to find out more. The million tangents is his usual style, and maybe not for everyone. However, the article is a comparison of specific implementations of generators (to give insight to the ES6 proposals) and a review of new iterator literature, with a bit of an introduction to them to get everyone on the same page. There are plenty of more gentle introductions to generators; this really isn't for the same audience. I found it to be quite a good article, insightful like just about every other post he writes. This is exactly the kind of content I wish there was more of being produced. Usually you can only piece together the kind of stuff he has in his blog from random forum comments (or by reading the V8/JavaScriptCore/Guile source, in Andy's case), as you rarely get JIT compiler implementors actually blogging.