Datadog's integration with Apache JMeter allows users to collect and visualize key test metrics in real-time, providing a quick overview of how new features affect an application's performance under stress. The integration collects test result metrics via a plugin and ingests individual test results as log events, enabling granular insight into what occurred during each request. Users can correlate test metrics with monitoring data from elsewhere in their stack, identifying patterns and trends that may indicate performance regression due to increased traffic. Additionally, the integration provides logs alongside metrics, allowing users to view detailed information about individual test runs and zero in on specific patterns that occur when an application is running under stress.