pub fn nvfp4_bytes(n: usize, k: usize) -> usizeExpand description
2026-09-25: Bytes of one NVFP4 QuantizedWeight: n * k / 2 packed E2M1
bytes plus n * k / 16 group-scale bytes, the two allocations of
quantize_to_nvfp4 and of QuantizedWeight::transpose_for_gemm_gs with 16-wide groups.