Java Flight Recorder is a performance monitoring tool built into the Java Virtual Machine (JVM). It allows developers to collect detailed information about the runtime behavior of Java applications, including memory usage, CPU performance, and thread activity. This data helps identify bottlenecks and optimize application performance. The tool operates with minimal overhead, making it suitable for production environments. Java Flight Recorder captures events and metrics over time, which can be analyzed later using various tools, including Java Mission Control. This capability aids in diagnosing issues and improving the overall efficiency of Java applications.