TDMS storage cycle speed decreases after the number of cycles increases

[ceidingyi]

Need to do an acoustic OCTAVE acquisition and storage analysis case, after the number of cycles increased, the prompt program can not keep up with the hardware sampling speed. I took the storage link alone and did the test. I found that after the cycle reached 2000, the cycle speed was obviously squatting. After 5000, it was like a turtle speed. What caused the cycle speed to drop? Is there any way to solve it? Attachment is an example program

[ceidingyi]

需要做一个声学PCB采集储存后分析的案子，在循环数增加后，提示程序跟不上硬件的采样速度。就单独把存储环节拿出来做测试，发现循环到了2000以后循环速度 明显下贱，5000以后犹如龟速，请问是什么导致了循环速度下降？有什么办法解决？附件是实例程序