在这种情况下，您可以通过连接启用了写缓存的外部存储设备来提高性能。
In this case, you can improve performance by connecting to an external storage device that has write cache enabled.
清单30展示了一个帮助器方法，它返回到外部内存中高速缓存的路径。
Listing 30 shows a helper method that returns the path to the cache in external memory.
可以在CONNECT标记返回的外部内容或数据上进行外部数据高速缓存。
External data caching can be performed on external content or data returned by CONNECT tags.
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