The Gradle Critical Path Analyzer and Diagnostic Builds feature helps identify bottlenecks in Gradle commands, allowing developers to optimize their build processes and reduce overall execution time. By analyzing the critical path of tasks executed during a Gradle command invocation, developers can pinpoint slow tasks and apply optimizations to improve efficiency. The Diagnostic Builds feature provides insights into why specific tasks are being executed, enabling developers to make informed decisions about their build configuration. By leveraging these features, developers can significantly reduce the duration of their Gradle builds and tests, leading to improved productivity and better engineering practices.