alt Hacker NewsI _also_ posted to HN and made it to #1[0]; the effect this had on my CPU/network traffic on a 5/EUR month VPS over at Hetzner was in the single digit percentages.
As per the wiki page for the C10k problem[1] where it says "_was_ [emphasis mine] the problem of optimizing computer networking stacks to handle a large number of clients at the same time". This was solved over a decade ago...
Now get off my lawn!
(TBF I think the author acknowledges this)
The c10k problem is a different problem. It relates to simultaneous open TCP connections at a server. It would take a very very large number of crawler bots to force open 10k connections, I suspect.