Dino, a JavaScript/TypeScript runtime, simplifies debugging with Open Telemetry. It auto-instruments applications, assigning trace IDs to logs and requests, enabling correlation of logs with specific requests in tools like Grafana. This allows for easier debugging of asynchronous operations and exceptions. Dino 2.2 has built-in Open Telemetry support, providing logs, traces, and metrics. Future features include expanded Dino Deploy integration. The presenter also mentions a petition to cancel Oracle's JavaScript trademark. Deno is introduced as a JavaScript and TypeScript runtime deeply integrated with TypeScript, offering more than just execution; it performs typechecking and prioritizes web standards. It aims to bridge the gap between browser and server-side JavaScript, providing a complete toolchain in a single file, and boasts enhanced security compared to Node.js, being backward compatible with Node since version 2. The speaker highlights the difficulties of debugging high-traffic servers, emphasizing the common reliance on console logs despite the availability of advanced debugging tools. The segment sets the stage for a practical demonstration of improved debugging techniques using a contrived example of a buggy service.A function `createUser` is created to simulate a real-world scenario. This function generates a UUID, simulates a database write using a delay, and introduces a bug where an exception is thrown if the UUID starts with 'a'. The speaker uses Deno's built-in features and external libraries like `jsr` to create the service, demonstrating the ease of development within the Deno environment.The buggy service is integrated into a simple API server using Hono, a framework similar to Express.js. The speaker demonstrates running the server, making requests using `curl`, and triggering the bug, leading to an exception. This sets up the need for a better debugging solution for production environments.The speaker illustrates the difficulties of debugging the contrived service in a high-traffic scenario, where numerous log entries and exceptions are interleaved, making it hard to associate log lines with specific requests or exceptions. This emphasizes the limitations of traditional console logging for production debugging and introduces the solution: OpenTelemetry and Deno.The speaker demonstrates how adding the OpenTelemetry unstable flag and an environment variable enables trace ID generation and propagation. By using Grafana, the speaker shows how trace IDs connect log lines and exceptions, allowing for efficient debugging even in complex scenarios. The improved debugging capabilities are highlighted by comparing the traditional log output with the trace-enhanced output.The speaker contrasts logs, traces, and metrics. Logs are simple, human-readable snapshots, while traces provide causality and timing information, improving debugging. Metrics offer aggregated insights. The segment explains how OpenTelemetry enhances Deno's debugging capabilities by providing traces, which are essentially enhanced logs with context and timing information.The speaker explains that Deno 2.2 has built-in telemetry support, automatically instrumenting applications and correlating logs with trace IDs. This automatic instrumentation extends to Node.js applications run within Deno, offering significant debugging improvements out of the box. The speaker encourages viewers to try OpenTelemetry with Deno and provides documentation links. The speaker concludes with a call to action, encouraging viewers to try OpenTelemetry in Deno and Deno Deploy and to report any issues. The segment concludes with a discussion about Oracle's ownership of the JavaScript trademark and a call to support an open letter to petition the US Patent Office to cancel the trademark. The speaker discusses the upcoming telemetry support in Deno Deploy, showcasing a brief demonstration of deploying a simple application and accessing its traces. This highlights the integration of OpenTelemetry across the Deno ecosystem, simplifying debugging for serverless applications.