Response time breakdown shows details such as the duration of each element for the system that you are testing.
响应时间分解为您所测试的系统显示了诸如每一项元素的周期等细节。
The Duration column lists the time the element itself took to load, while the Total Duration column shows how long all the sub elements took.
Duration 栏列出装载元素本身所用的时间，Total Duration 栏列出所有子元素所用的时间。
The expiration-cache element specifies the duration, in seconds, that a cache considers the portlet fragment to be "fresh".
expiration-cache 元素指定了缓存将 Portlet 片段视为“新”的持续时间（以秒为单位）。
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