Ask HN: How do you read/parse HN comments?

I tend to read a comment thread once, then often come back to it again when I see that the comments count increased by a significant number.

For the people who have a similar habit: Is there a way you guys extract the content diff or do you just reread the whole thread again? With upvotes hidden, I find myself to scan the longer comments first. Or does anyone have another, 'better' reading mode?