“For an understanding of just how much space HLLs really save, consider the r/pics post included at the top of this blog post. It received over 1 million unique users. If we had to store 1 million unique user IDs, and each user ID is an 8-byte long, then we would require 8 megabytes of memory just to…”— Krishnan Chandra, redditblog.comTagged: System Architecture, Algorithms, Scale