Windows系统程序设计之DLL基础，使用 DLL 有很多好处，比如促进代码的模块化、代码重用、内存的有效使用和减少所占用的磁盘空间等。-DLL-based Windows system programming, using the DLL has many advantages, such as the promotion code modularity and code reuse and efficient memory usage, and to reduce the disk spa

It should be noted that there is still room to improve the speed and the memory usage of the algorithms, using for instance displacement structure algorithms for the RQ decomposition and Lanczos algorithms for the SVD.