Page loads went from essentially unnoticeable to several seconds when I switched over to this XPath expression, even on an unloaded local server.
当改为XPath表达式之后页面加载延迟从难以觉察变成了几秒钟，即使是在负荷不高的本地服务器上。
If more complex queries are executed, or if several queries are executed in sequence, the difference in the execution time is not just sub-seconds but seconds or even minutes.
如果要执行更复杂的查询，或者要连续执行多个查询，那么执行时间的差距就不是次秒级的，而是以秒甚至分钟来计算的。
You'll see that it takes several seconds to find all variations for auto-completion, even for small projects.
您将看到找到自动完成的所有变化需要花好几秒钟，即便是小项目。
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