Christopher Chedeau (@vjeux) is a Facebook Software Engineer in the Photos Team. Before that, he went to EPITA, a 5-year Computer Science school and majored in its R&D lab LRDE. He also worked for Curse during the nights and week-ends. React is a JavaScript library for building user interfaces developed by Facebook. It has been designed from the ground up with performance in mind. In this article
![React's diff algorithm](https://cdn-ak-scissors.b.st-hatena.com/image/square/3a022fb2e5217640810edd8531fe759db1ccf6ef/height=288;version=1;width=512/https%3A%2F%2Fcalendar.perfplanet.com%2Fwp-content%2Fuploads%2F2013%2F12%2Fvjeux%2F6.png)