---
title: Code-level metrics
source: https://docs.newrelic.com/docs/apm/agents/nodejs-agent/installation-configuration/nodejs-code-level-metrics
---

Code-level metrics are span attributes that the Node.js agent attaches to your application's spans, pinpointing the exact function and file responsible for a given span. This allows you to be more proactive about addressing performance issues as you review your code. You can view these attributes on individual spans in [distributed tracing](https://docs.newrelic.com/docs/distributed-tracing/ui-data/understand-use-distributed-tracing-data/), or query them directly with [NRQL](https://docs.newrelic.com/docs/nrql/get-started/introduction-nrql-new-relics-query-language/).

> #### ⚠️ IMPORTANT
>
> Code-level metrics are available for Node.js agent version 9.7.5 or higher, and enabled by default for version 10.5.0 and higher. To change this configuration, check out our [documentation](https://docs.newrelic.com/docs/apm/agents/nodejs-agent/installation-configuration/nodejs-agent-configuration#code-level-metrics).

## Agent attributes [#attributes]

The Node.js agent reports and attaches the following attributes to most spans produced by [web frameworks](https://docs.newrelic.com/docs/apm/agents/nodejs-agent/getting-started/compatibility-requirements-nodejs-agent#support) in your application.

> #### ⚠️ IMPORTANT
>
> In some cases, the agent will directly wrap base framework code that's invoked within your application, and these attributes won't be attached.

| Name            | Description                                                                                             | Example                                 |
| --------------- | ------------------------------------------------------------------------------------------------------- | --------------------------------------- |
| `code.function` | The name of the instrumented function. It will be `(anonymous)` for both anonymous and arrow functions. | routeHandler                            |
| `code.filepath` | The absolute path to the source code file where `code.function` is defined.                             | /usr/local/app/sample-node-app/index.js |
| `code.lineno`   | The line number where `code.function` is defined in `code.filepath`.                                    | 639                                     |
| `code.lineno`   | The column number where `code.function` is defined in `code.filepath`.                                  | 47                                      |