Of the things that get posted to HN on an average day, this technical, interesting, well-written piece that shows up every several months is the one that really bothers you to see? I've read it before too, but its having become part of the site's recurring culture seems… not so bad to me.
Hey, I am really sorry for posting this. I didn't know it was posted earlier too! I thought this might be a good post to discuss on HN. Is there any way of knowing if the content is posted earlier on HN?
I'm not sure if you misread my comment or perhaps just posted this as a reply to the wrong comment, but I completely agree that it's a good HN post and I (personally) don't think it's a problem for it to get posted again every few months.
HN does have a dupe detector and won't let an identical URL be posted a second time. But, as you can see in the above comments on this same page, even very slight differences are sufficient for it to allow the post through.
Anyway, I hope you keep posting items like this! If they're not sufficiently interesting and novel to enough people, they won't be upvoted. No harm.