Logs are a critical thing in production systems and I would like to start a discussion about bringing low-level support for efficient logging into GHC. Context (in Haskell) Something I see quite often in Haskell applications is the interleaved outputs of two or more logging functions, from the main application that needs to log something, to libraries in dev mode that trace their execution (like printing SQL queries on the terminal as they appear). Michael Snoyman wrote a blog post in 2016 ab...