Your blog will probably work well at first, but you’ll run into problems as soon as one of your amazing posts goes viral and gets thousands of comments. You’ll notice that your main page starts taking a lot longer to load. Even when you’re the only one browsing your blog, it just won’t feel as snappy anymore.
Discovering projections and their benefits.
Original title and link: Speeding Up MongoDB Queries by Requesting Only the Fields You Need ( ©myNoSQL)