So long as the operands are both already sorted into document order, this avoids the need to allocate memory for the intermediatenode sets.
只要已经按文档顺序排序了这两个操作数,就不必为中间节点集分配内存。
2
The intermediatenode load algorithm evaluates the load efficiency of the intermediate nodes according to bandwidth and computing ability.
中继点负载评估理论是以频宽以及运算能力来评估一个中继点的负载能力及效率。
3
If you must use descendant selectors, prefer child selectors, which at least only require evaluation of one additional node, not all the intermediate nodes up to an ancestor.