Worked on the microsoft/STL repository to optimize the Poisson distribution constructor within the C++ standard library. Focused on algorithm implementation and performance optimization, the work introduced a threshold-based approach that switches between two initialization methods depending on the input range. This adjustment improved runtime efficiency for specific Poisson distribution scenarios and enhanced robustness by initializing member variables with default values to ensure a defined state. The changes addressed edge-case failures and contributed to more reliable random distribution behavior for downstream users. The work was implemented in C++ and demonstrated a targeted, in-depth approach to improving core library performance and reliability.