Datadog has released distributed tracing for AWS Lambda functions written in Python and Node.js, and now also supports Go and Java. This feature enables real-time visibility across serverless applications, allowing developers to monitor performance and identify code-level issues such as poorly performing goroutines or syntax problems in Java functions. The tracer automatically captures requests across all components of the environment, providing an end-to-end view of application performance. It can detect cold starts automatically and tag slow request traces with a `cold_start` attribute, making it easier to take mitigating actions. With support for Go and Java Lambda functions, Datadog APM helps developers gain real-time visibility into the performance of their serverless applications without requiring any code changes or configuration.