Meteor uses Fibers to allow you to write synchronous code on the server. Usually in Node.js applications, you need to nest callbacks when you connect with the database. Meteor also provides the ability to have dynamically scoped variables. Understanding these key features of Meteor is critical to understanding performance in Meteor. We cover both these concepts in depth in this class and start from the beginning by looking at the call stack or task queue and seeing what happens when we make an asynchronous call.
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