How has jstack changed in recent Java versions?

As Java has evolved, the `jstack` tool has seen several improvements and changes. Initially designed for thread dump generation, recent versions of Java have enhanced its functionality and usability, making it more efficient for diagnosing problems related to application performance and deadlocks.

In Java 9 and later, `jstack`'s ability to handle non-Java processes has improved, and the output format has been standardized. Additionally, enhancements have been made in the way it integrates with other monitoring tools, significantly aiding developers in troubleshooting complex issues.

An important feature introduced is the support for unified JVM logging, which allows developers to correlate thread stacks with JVM logs, giving deeper insights into application behavior during runtime.

Overall, the evolution of `jstack` reflects Java's commitment to providing robust tools for developers, improving the diagnostics capabilities that are essential for maintaining high-performance applications.