但是，如果使用具有相同分组关键字的多个聚合，或者对相同列进行计数的计数函数，其不会显著增加规则的执行时间。

But if you use multiple aggregations with the same grouping keys, or multiple counting functions that count the same column, it will not significantly increase the execution time of the rule.

youdao

除了会增加大小和执行时间外，这样的重命名函数有时可能会带来管理上的恶梦。

Besides increasing the size and the execution time, such renamed functions can sometimes prove to be management nightmares.

youdao

在样例服务实现中，我们要确保，每个函数所需的执行时间最少是一秒，而且在执行的同时打印出一些消息。

In the sample service implementation, we make sure that, each function's execution time requires at least one second and it will print out some message while being executed.

youdao