During March 2026, lhh enhanced span lifecycle management for asynchronous RPC callbacks in the apache/brpc repository. They introduced smart pointers to address use-after-free risks, refactoring the bthread span lifecycle and optimizing the span API for safer memory handling and improved runtime performance. Working primarily in C++ and leveraging expertise in asynchronous programming, concurrency, and memory management, lhh’s changes reduced runtime risks in high-concurrency RPC paths and improved the overall memory footprint. The work demonstrated a focused approach to reliability and safety in asynchronous systems, delivering a single, well-scoped feature that addressed a critical aspect of memory safety in brpc.