Modern Bytecode Instrumentation with ByteBuddy

Explore the intricacies of bytecode instrumentation and JVM internals in this comprehensive interview featuring Rafael Winterhalter, creator of ByteBuddy, one of the most critical libraries in modern Java development. Discover how bytecode instrumentation powers essential tools like Mockito, Hibernate, and countless monitoring solutions across the JVM ecosystem. Learn about ByteBuddy's design philosophy and its role in replacing CGLIB while addressing early development challenges. Gain insights into real-world adoption stories and the open-source reality of maintaining a widely-used library. Understand performance myths and JVM behavior, including discussions of JVM bugs, JIT issues, and instrumentation pitfalls that developers encounter. Examine the challenges of supporting legacy Java versions in enterprise environments, including why companies still run Java 5/6 and the economics behind these decisions. Delve into the complexities of testing across multiple JDKs and the evolution of Java with modules and unsafe operations. Hear about the realities of maintaining a one-person open-source project, including developer evangelism, consulting versus product engineering, and managing burnout and sustainability. Explore perspectives on AI in software development, rethinking Java build tools, and addressing build security and dependency risks in modern development workflows.