这个调优步骤将极大地改进BPC API查询的响应时间。
This tuning step greatly improves the response times of BPC API queries.
在每个步骤中，它还会度量事务的各个组件在总响应时间中所占的比例。
At each step it also measures how each component of a transaction contributes to the overall response time.
但是这些步骤中的许多步骤都需要访问一些资源，这些资源在客户下订单时可能可用也可能不可用，或者这些资源的响应时间可能无法预料。
But many of these steps involve accessing resources that may or may not be available at the time the customer places the order, or whose response time may be unpredictable.
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