https://www.libtorrent.org/tuning.html
https://libtorrent.org/reference-Settings.html
bittorrent.org/bittorrentecon.pdf
http://www.libtorrent.org/security-audit.html
https://blog.libtorrent.org/2011/11/writing-a-fast-piece-picker/
https://blog.libtorrent.org/2012/01/seeding-a-million-torrents/
https://eklitzke.org/the-caveats-of-tcp-nodelay
All the articles at https://blog.libtorrent.org