In November 2024, Jan Naumann developed a new CPU QR-based SVD algorithm option for the ROCm/jax repository, expanding JAX’s svd functionality beyond the existing divide-and-conquer approach. He implemented a C++ wrapper using FFI to interface with LAPACK’s gesvd routine, enabling QR-based SVD computations on CPU backends. This work required expertise in C++, Python, and numerical linear algebra, and involved extending the svd API to allow users to select the QR algorithm for improved numerical properties or performance trade-offs. The feature deepened JAX’s linear algebra capabilities and provided users with a flexible, alternative SVD computation path on CPUs.