Harshit Kumar addressed a performance issue in the Azure/azure-sdk-for-cpp repository by implementing a targeted fix for CPU busy-waiting during SSL socket writes. He introduced a delay mechanism when curl_easy_send returned zero bytes, which reduced unnecessary CPU spinning and allowed the thread scheduler to manage other tasks more efficiently. This change improved throughput and stability in IO-bound SSL scenarios without altering the public API. Harshit applied his expertise in C++, multithreading, and network programming to deliver a focused, well-documented solution. The work demonstrated a deep understanding of performance-sensitive I/O paths and careful attention to code quality and maintainability.