Go’s structured logging library (log/slog) is quite the clever piece of standard library code. This is thanks to the processing of log attributes {key:value} with zero heap allocations. And despite the slog.Logger interface (inspired by packages uber-go/zap and rs/zerolog) now long being the go-to idiom for any generic logging use-cases in Go; it is additionally highly-optimized for use in application hot-paths.