分组应该能够改进性能，因为处理程序能够优化检测分组边界的方式。
Grouping should improve performance because the processor will be able to optimize the means of detecting group boundaries.
这个分组有助于您定义和该处理程序调用模型相关联的策略。
This grouping helps you define policies that you want associated with the handler invocation model.
这个元素允许程序员获取一组节点，按某些标准来进行分组，然后处理由那一选择过程组成的每一个组。
This element allows the programmer to take a set of nodes, group it by some criteria, and then process each group formed by that selection process.
应用推荐