React is a powerful library for user interfaces. Combined with ReFlux, an add-on library that implements Facebook's flux architecture, structuring an entire front-end application becomes incredibly simple. When your application gets large, React, in combination with some community libraries, offers some important tools to fine-tune your application's performance. Join us as we explore how to get an application built on the Force.com Platform using React.js, ReFlux.js, and some other open source libraries. We'll dive into scaling the application using different tools to measure and tweak performance to get optimal results. Some of these tools and techniques include: - Immutable data structures - Implementation of lifecycle methods - The ReactPerf framework.