还可以在使用 -D 开关时寻找调用之间的长 delta，通过这种方法寻找潜在的性能延迟原因。

You can also use it to identify potential performance delays by looking for long deltas between calls when using the -D switch.

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介绍了1024位声表面波抽头延迟线（SAWTDL）的几种设计结构及试验结果。其中声学级联结构为首次提出，是解决高位、长时延SAWTDL设计的行之有效的结构。

Several design methods and their experimental results are introduced. Design of acoustic cascade is firstly put up, which is effectively used in 1024 bits long delay time SAWTDL construction.

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