Worked on the square/okio repository to deliver a performance-focused upgrade to the AsyncTimeout component, replacing its linked-list timeout mechanism with a heap-based PriorityQueue. This redesign introduced a new PriorityQueue abstraction, leveraging advanced data structures and concurrency techniques to improve timeout efficiency and scalability under high-load scenarios. The implementation included comprehensive benchmarks to quantify performance gains and extensive unit tests to ensure correctness and maintainability. Utilizing Java and Kotlin, the work emphasized performance optimization and robust testing practices. The result enhanced resource utilization and responsiveness in timeout handling, addressing scalability challenges and contributing to the long-term maintainability of the codebase.