Vincent Chen developed a seeded xxhash64 function for deterministic hashing in the Presto SQL dialect within the IBM/velox repository. Using C++ and leveraging expertise in database functions and hashing algorithms, Vincent implemented a feature that accepts a bigint seed argument, enabling consistent hashing of binary input. This approach allows for reproducible sharding and partitioning, which improves cache-hit rates and ensures stable analytics results across distributed queries. The work addressed the need for deterministic behavior in distributed data processing, enhancing Presto compatibility. Over the month, Vincent focused on feature development, demonstrating depth in C++ and database-oriented algorithm design.