User-perceived Performance 感知性能
user perceived value 用户感知价值
user perceived latency 用户感知时间
User-perceived character 用户观感字符
user perceived availability 用户感知的可用性
User-Perceived Quality of Service 用户感知服务质量
This approach improves user-perceived responsiveness and increases overall system efficiency and scalability.
这种方法能提高用户感受到的响应性，并增加系统整体效率和可伸缩性。
So the subtraction of user input time from total time, namely the "real execution time", can truly reflect the user-perceived performance.
此时程序的“实际执行时间”，即整体执行时间与等待用户响应时间之差，才能够真实地反映用户可察觉的系统处理能力。
But there's always an outcome that has a perceived (by the user) value.
但结果始终有一个可以感知(由用户)的值。
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