During January 2025, Jibing Li contributed backend development work to the Jibing-Li/incubator-doris repository, focusing on optimizing session variable access within file-related scan nodes. He refactored the codebase to replace repeated ConnectContext.get().getSessionVariable() calls with a direct sessionVariable reference, reducing unnecessary context lookups and improving performance across the file scan path. This approach leveraged Java’s object-oriented features, introducing saved member variables to streamline session access. The work demonstrated a thoughtful balance between maintainability and efficiency, addressing a specific performance bottleneck in the code. Jibing Li’s contributions reflected a solid understanding of Java and backend optimization techniques.