Understand serverless function performance with Cold Start Tracing

Cold Start Tracing is a new feature of Datadog Serverless APM that helps developers visualize and understand the causes behind cold starts in their Lambda functions. By providing an under-the-hood view of dependencies loaded during a cold start, this tracing tool allows developers to identify which processes contribute most to the duration of a cold start. Cold Start Tracing also enables users to test changes made to their Lambda function configurations and assess their effectiveness in mitigating cold starts. Currently available for Node.js and Python runtimes, with more support coming soon, this feature aims to improve the performance of serverless functions by providing actionable insights into reducing cold start overhead.