JDev_014：使用JDeveloper 11g 检查程序性能

使用 Run->CPU Profiler 可以帮助我们检查程序的性能。

1. Hotspots 视图
排序显示在CPU取样时间内，所有方法占用的CPU时间。


2. Call Stacks 视图
显示在CPU取样时间内，按调用层次显示所有方法占用的CPU时间。

3. 参数说明
（1）CPU %：
Displays the percentage of the currently selected data column.
If the CPU column is selected, indicated by a downward-pointing triangle, this column is named CPU %.
If CPUx were selected, the column name would be CPUx %.

（2）CPU (ms)：
Displays the cumulative amount of CPU time spent in seconds, in each method and all the methods it calls.

（3）CPUx(ms)：
Displays the amount of CPU time spent in each method individually.

4. 典型案例

参考文献：
1. http://xmlandmore.blogspot.jp/2012/01/starting-cpu-profiler-in-jdeveloper.html