In the current era of rapid digital development, programming languages play a key role in the development of various systems. As an emerging programming language, the study of DDFP's input and output mechanism is of great significance. This paper focuses on the efficiency, stability and compatibility issues faced by DDFP language input and output in practical applications. Through in-depth analysis of its grammatical structure and operating mechanism, the re-architecture of the input and output interface, the improvement of the data transmission algorithm and the adaptation solutions for different platforms are proposed. Through experiments, benchmark tests are carried out after the environment is initialized, covering large file transfer, high concurrent requests and cross-platform compatibility test scenarios, and data collection and analysis are performed. The results show that the input and output performance of the optimized DDFP is significantly improved. In terms of large file transmission, the 256 KB buffer configuration has the best large file transmission performance. The specific improvement effect is reflected in the improvement of transmission time and CPU occupancy. In terms of high concurrent requests, the optimized version applies a backpressure control mechanism. When the system load exceeds 80%, the error rate is stably controlled below 0.8%, and the buffer hit rate remains at 92%. The above effectively improves system stability and buffer utilization efficiency.