Filtering the execution trace based on the time taken for the method calls should show some interesting results.

根据方法调用所花的时间筛选执行踪迹会得出一些有趣的结果。

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If the filtering happens in the application, there is no way of knowing how many rows to request, thus potentially leading to multiple calls to get a single page of data.

如果筛选在应用程序中进行，则无法知道请求了多少行，因此可能导致通过多次调用来获取单页数据的情况。

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Amazon (AMZN) calls this homegrown math "item-to-item collaborative filtering," and it's used this algorithm to heavily customize the browsing experience for returning customers.

亚马逊把这套自主研发的算法称为“从项目到项目的协同过滤算法”。依靠这套算法，亚马逊向回头客们提供了深度定制的浏览体验。

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