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TDMS storage cycle speed decreases after the number of cycles increases

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

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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

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