在这里尝试键入各种密码并且注意输入这些密码的总时间是如何记录的。
Try typing your various passwords here and notice how the overall time to enter them is recorded.
您可通过定义具有过滤条件的虚拟表,来有效地减少从源所读取记录的数量,并减小规则的总执行时间。
You can effectively reduce the number of records that are read from the source, and reduce the overall execution time of a rule, by defining a virtual table with a filter condition.
完成这项任务所耗的时间变成为分区大小的函数 f(1,000,000),而不再是要处理的总记录数的函数 f(100,000,000)。
The elapsed time for completing the task becomes a function of the partition size f(1,000,000) versus a function of the total number of records to process f(100,000,000).
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