Too late to edit, but it appears that they are per this comment on a different article and the documentation it references: https://news.ycombinator.com/item?id

Too late to edit, but it appears that they are per this comment on a different article and the documentation it references: https://news.ycombinator.com/item?id=46607265 https://news.ycombinator.com/item?id=46607265