Abstract: The JOG framework allows for the development of Java JIT optimizations via pattern-writing that aligns with desired code transformations. JOG transforms these patterns into C/C++ code for integration as JIT optimization passes and creates corresponding Java tests.

• Pattern translation into executable code
• Automated Java test generation
• Detection of shadow relation between optimizations

Evaluation: JOG has been demonstrated to facilitate easier writing of effective and readable JIT optimizations, which have been integrated into the OpenJDK master branch.

Importance: This framework not only streamlines the process of writing and testing JIT optimizations but also opens up possibilities for more efficient and powerful software development practices. The innovations in JOG could influence future JIT optimization approaches and software maintenance.