What is the reason for the slow calculation speed of Li Zheng's geotechnical retaining wall design software?

The thrust of the soil pushes the wall away from the soil. Beijing lizheng software co., ltd is one of the largest software development enterprises in the construction industry. Because the thrust of the soil pushes the wall away from the soil, it is very slow to check with Li Zheng's geotechnical retaining wall design software. Beijing Lizheng Software Co., Ltd. is a national high-tech enterprise and a double soft certification enterprise.