产生的页面显示一个 SQL 语句的性能信息，比如此语句在服务器上执行的次数 (Count) 和平均运行时间。
The resulting page displays performance information about an SQL statement, such as how many times the statement has been executed at the server (Count) and average run time.
对程序中的某些类和方法，我需要了解它们被调用次数，各自平均执行时间和整体平均时间
For certain classes and methods in my application I want to see the invocation counts, the average self execution time and the average wall clock time.
对于多次发出的命令，还会列出命令调用次数的编号，并显示指定命令的平均响应时间。
For commands that were issued multiple times, it will list the number of times the command was called, and it will display the average response time for a given command.
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