title: Do you use Big-O complexity evaluation in the 'real world'?
body: <p>Recently in an interview I was asked several questions related to the Big-O of various algorithms that came up in the course of the technical questions.  I don't think I did very well on this... In the ten years since I took programming courses where we were asked to calculate the Big-O of algorithms I have not have one discussion about the 'Big-O' of anything I have worked on or designed.  I have been involved in many discussions with other team members and with the architects I have worked with about the complexity and speed of code, but I have never been part of a team that actually used Big-O calculations on a real project.  The discussions are always "is there a better or more efficient way to do this given our understanding of out data?"  Never "what is the complexity of this algorithm"? </p>
  
  <p>I was wondering if people actually have discussions about the "Big-O" of their code in the real word?</p>