Project LightSpeed: Rewriting the Messenger codebase for a faster, smaller, and simpler messaging app We are excited to begin rolling out the new version of Messenger on iOS. To make the Messenger iOS app faster, smaller, and simpler, we rebuilt the architecture and rewrote the entire codebase, which is an incredibly rare undertaking and involved engineers from across the company. Compared with th
Highly complex services, such as those here at Facebook, have large source code bases in order to deliver a wide range of features and functionality. Even after the machine code for one of these services is compiled, it can range from 10s to 100s of megabytes in size, which is often too large to fit in any modern CPU instruction cache. As a result, the hardware spends a considerable amount of proc
Next week, we are going to relicense our open source projects React, Jest, Flow, and Immutable.js under the MIT license. We’re relicensing these projects because React is the foundation of a broad ecosystem of open source software for the web, and we don’t want to hold back forward progress for nontechnical reasons. This decision comes after several weeks of disappointment and uncertainty for our
Making Facebook’s software infrastructure more energy efficient with Autoscale Improving energy efficiency and reducing environmental impact as we scale is a top priority for our data center teams. We’ve talked a lot about our progress on energy-efficient hardware and data center design through the Open Compute Project, but we’ve also started looking at how we could improve the energy efficiency o
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