对于某些情况——比如在您自己的工作站本地运行的Web服务器、数据库和浏览器——挂钟时间能够提供信息。

For some circumstances — say, running the Web server, database, and browser locally on your own workstation — wall clock time can be informative.

youdao

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。

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

youdao

然而，挂钟时间对于其他大多数情况而言并无实际意义，比如网络延迟时间、活动的Web服务器或者活动的数据库。

However, wall clock time is merely anecdotal for most other permutations, such as those that include network latency; a trafficked, live Web server; or an active database.

youdao