A <i>lot</i>.<p>I actually optimize for the comments, heh. I open HN links in new tabs and then wait a day or two for the discussion to complete before reading through them. So I don&#x27;t end up refreshing for new comments or re-reading the same ones.<p>There are a couple downsides to this though: One, I generally miss the window for participation. Two, my browser is perpetually filled with dozens of HN tabs.