New Relic’s Node agent release 1.28.0 enhances Express middleware instrumentation

New Relic has released version 1.28.0 of its Node.js agent, which enhances monitoring capabilities for Express applications by automatically instrumenting middleware functions. This update allows users to gain detailed insights into the performance of middleware components within their applications, with metrics now available for each middleware function executed during a transaction. The new version also improves transaction traces by displaying segments for middleware, routers, mounted apps, and route paths, enabling developers to identify where time is spent and differentiate between slow components. Furthermore, error handlers in Express are treated as middleware, and the system recommends using named functions for better metric differentiation. These improvements aim to provide better visibility into both global and route-specific middleware functions for Express, the most commonly used web framework among New Relic’s Node.js users.

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