Lawrence Lim optimized the Baby-Step Giant-Step (BSGS) algorithm in the google/heir repository, focusing on enhancing cryptographic performance for encryption and decryption workloads. He refined the selection of baby-step and giant-step sizes, reduced unnecessary ciphertext rotations, and improved the efficiency of matrix operations, all implemented in C++. By addressing issue #2162, Lawrence corrected suboptimal BSGS parameter choices and aligned the algorithm’s behavior with project requirements. His work, which included thorough unit testing and clear documentation, resulted in improved throughput and reduced latency for cryptographic operations, demonstrating depth in algorithm optimization and a strong command of C++ development practices.