Resources that are separate from the application code and allow your application to gracefully optimize its behavior for a variety of device configurations.
与应用代码分离的资源，它能让你的应用通过各种设备配置优雅的优化其行为。
You can further optimize this situation by using pthread_mutex_timedlock API, if your system supports it (see Resources).
如果系统支持的话，可以使用 pthread_mutex_timedlock API 进一步优化这个场景（见 参考资料）。
Profiling is an important part of successful SaaS projects because it gives you the opportunity to optimize the way your application uses system resources, as shown in Figure 8.
分析是成功 SaaS 项目的重要部分，因为它能够优化应用程序使用系统资源的方式，如图 8 所示。
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