We’re in favor of asynchronous and reactive styles of programming especially for network I/O-bound distributed systems. Reactive libraries often sit on top of a lower level nonblocking communication framework such as Netty. Recently SwiftNIO, an open source nonblocking networking framework from Apple, has grabbed our attention. SwiftNIO is similar to Netty but written in Swift. It’s currently supported on MacOS and Ubuntu and implements HTTP as a higher-level protocol. We’re excited to see the usage of this framework and integration of it into higher-level application frameworks and other protocols.