You can begin to work with the content at the beginning before you see the content at the end. This makes it very fast, very efficient, and very parsimonious with memory.
在文档后面的内容编译完成之前，可以先处理已编译好的文档前面的内容,从而实现非常快速、非常高效、非常节省地使用内存。
Efficient SAX processing code can be blazingly fast, and memory usage can be kept to a minimum and tailored for the specific needs of the application.
高效的SAX处理代码可以快得多，而内存使用量可以保持在最低并且可以根据应用程序的具体需求来调整。
The dom4j document object model is fast, memory-efficient, and also offers great extensibility.
dom4j 文档对象模型不仅速度快、内存使用高效，并且提供了很好的可扩展性。
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