2010. I remember those times. I was doing these things for science in 2008. Performance-wise, PEX was much faster than DHT. At least, in my setting.
This year, I was giving it as an assignment to students. Does not take much time with LLMs.
(2010)
old paper
Bitmagnet -https://bitmagnet.io/ - does exactly that. I left it running for a few weeks and then stopped the crawler. Didn't expect much, but still somewhat disappointed by the garbage it reeled in.