useful thread的意思|示意

The thread pool is a useful tool for organizing server applications.

线程池是组织服务器应用程序的有用工具。

On the other hand, if the lock is held for a longer time, spinning is wasteful as the spinning thread consumes CPU without doing anything useful.

另一方面，如果锁被占有很长时间，那么自旋的线程只会消耗CPU而不做任何有用的工作，因此带来浪费。

However, only one thread is running in this test run, so it's not especially useful for comparative analysis.

然而，在这个测试运行中只运行了一个线程，所以比较分析的用处并不大。