Probe to fire every 500 milliseconds (wall clock time).

这指定每隔500毫秒(时钟时间)触发一次探测。

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Example: Probe to fire every 500 milliseconds (wall clock time).

示例：每500毫秒(墙上时钟时间)触发一次的探针。

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A simple performance metric is wall clock time, or measuring the real-world delay between a request for a page and a finished rendering.

一个简单的性能指标是挂钟时间(wall clock time)，或测量页面请求与完成呈现之间的实际延迟。

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