将作用域设置为私有的页面存储在浏览器缓存中能达到对缓存的最佳内存利用，同时其位置也尽可能地接近最终用户。

Storing privately scoped pages in a browser cache is optimal with regard to memory utilization in the cache, as well as in its location as close as possible to the end user.

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个人计算机对经常调用的代码设置了存储器超高速缓存，大多数浏览器程序都有本地高速缓存，它在内存中或磁盘上存储最近浏览过的网页。

PCs have memory caches for code that's called often, and most browser programs have local caches that store recently surfed Web pages either in memory or on disk.

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