This is owing to 3 major factors: performance increment of 64-bit CPU, optimized compiler, and contribution from DFT, a FFT software in Intel MKL mathlab.

• 其性能的提高主要归功于3个因素,即64位处理器硬件性能的提高、优化编译器的贡献和Intel MKL数学库中DFT程序的贡献。