pino - Extremely fast node.js logger
Extremely fast node.js logger, inspired by Bunyan. It also includes a shell utility to pretty-print its log files. Due to Node's single-threaded event-loop, it's highly recommended that sending, alert triggering, reformatting and all forms of log processing is conducted in a separate process. In Pino parlance, it is called as log processors "transports", and recommend that the transports be run as separate processes, piping the stdout of the application to the stdin of the transport.