对网页载入时间进行测量，是有其价值的。
"There's value in measuring how long it takes pages to load".
人们通常没有耐心来等待长时间的网页加载，所以是你的文件尺寸保持很低，来加速你的网页载入时间。
People often don't have the patience to wait through long web page loads, so keeping your file sizes low speeds up your web page access times.
你无法享受网页滑动(一系列保持更新的网页)，如果页面载入时间太久。
You can’t enjoy a WebSlice (which is a slice of a Webpage that is constantly updated) if it takes forever to load.
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