Worked on the pinterest/starrocks repository to deliver a targeted performance enhancement for the OlapScanNode component. Focused on backend development and code refactoring in Java, the work ensured that getAliveComputeNodes is invoked only once per query execution, reducing redundant calls and lowering per-query overhead. Introduced a private helper method, checkSomeAliveComputeNode, and developed unit tests to verify the single-call behavior, emphasizing test-driven development and maintainability. This optimization improved OLAP scan throughput under concurrent workloads by streamlining node checks. The approach demonstrated skills in performance optimization, code tracing, and robust testing practices, contributing to more efficient query execution paths.