Extensive discussion: <a href="https://news.ycombinator.com/item?id=5655075" rel="nofollow">https://news.ycombinator.com/item?id=5655075</a><p><a href="https://hn.algolia.com/?q=complexity+cheat+sheet#!/story/forever/0/complexity%20cheat%20sheet" rel="nofollow">https://hn.algolia.com/?q=complexity+cheat+sheet#!/story/for...</a>