Reading data streams and writing results to streams is convenient, because the application does not have to read a large portion of the file, much less the whole file, into memory.
Data binding is not only more convenient for developers than working with a document model, it's also much more efficient in terms of both performance and memory use.
与使用文档模型相比，数据绑定为开发人员带来了更大的方便，同时，它在性能和内存使用方面的效率也更高。
3
Extend your hand to the other person,and if it's convenient find a way to say his or her name two or three times to help fix it in memory.