[BUG]: DD profile shows high heap size and hight CPU Wall time under dd-trace fastify handler.

[kovacss]

Tracer Version(s)

5.67.0

Node.js Version(s)

22.20.0

Bug Report

Profiles of our node-js applications show high heap size and high CPU Wall time and under the dd-trace fastify pre-handler and specifically under key.
I wasn't too sure what this key relates to as looking in the code, there is nothing like key (expect Object.keys)

I'm not super familiar with node-js profiles so this might be the expected behaviour but I find it odd that it spends as much resource on just dd-trace. This also seem to be related with spike of latency at the HTTP level

For context, we only use dd-trace for profiles and metrics as we already have an open-telemetry configuration separately.

Thank you for your help and guidance.

Reproduction Code

No response

Error Logs

No response

Tracer Config

const config = {
  service: process.env.APPLICATION_NAME,
  env: process.env.ENVIRONMENT ?? 'development',
  hostname: process.env.DD_AGENT_HOST || 'localhost',

  // 🎯 DISABLE TRACING - Keep your existing OpenTelemetry setup
  apmTracingEnabled: false,
  sampleRate: 0,

  // ✅ ENABLE PROFILING - This is what we want!
  profiling: true,
  runtimeMetrics: true,

  plugins: false
}

Operating System

Linux 2ab85c96af6f 4.14.355-271.569.amzn2.x86_64

Bundling

No Bundling

[BridgeAR]

@kovacss could you please open an issue with our support team? Otherwise we can not really look at this anytime soon.

https://www.datadoghq.com/support/