This counter usually indicates the work done by the garbage collector to collect and compact memory on behalf of the application 此计数器通常指示垃圾回收器代表该应用程序为收集和压缩内存而执行的工作。
2.
This message is sent to all top - level windows when the system detects more than 12 . 5 percent of system time over a 30 - to 60 - second interval is being spent compacting memory 如果系统检测到压缩内存所用的时间超过了12 . 5 %的系统时间（ 30到60秒间隔） ，则将此消息发送到所有顶级窗口。
