在不必要的情况下使用缓存，或者试图用高速缓存来弥补糟糕的应用程序设计，可能开始能让您尝到一些甜头，但对于长期运行的应用程序来说并不是一个最佳解决方案。
Using a cache when it is not necessary, or trying to make up for a bad application design with caching, may give you some initial quick wins, but would not be the best solution in the long run.
此处使用的应用程序是专门为说明不同的EJB 3.0和JPA功能而设计的，而不是作为应用程序设计最佳实践的一个示例。
The application used here was designed solely for illustrating different EJB 3.0 and JPA features, and not to be an example of application design best practices.
在应用程序设计和实现过程中应用良好的设计决策和最佳实践可以防止许多可能需要优化的编码问题，从而能够对应用程序执行预先优化。
Good design decisions and best practices in application design and implementation provide a sort of preoptimization by eliminating many of the coding issues that might have required optimization.
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