- Add FileAndBuf struct wrapping file + reusable read_buf Vec - read(): reuse Vec capacity across calls, use unsafe set_len to skip memset - ~15% read throughput improvement (2.6 → 3.0 GB/s on localhost smbclient)
- Add FileAndBuf struct wrapping file + reusable read_buf Vec - read(): reuse Vec capacity across calls, use unsafe set_len to skip memset - ~15% read throughput improvement (2.6 → 3.0 GB/s on localhost smbclient)