Time to First Byte: What It Is and Why It Matters
CSS Wizardry
AUGUST 7, 2019
The first—and often most surprising for people to learn—thing that I want to draw your attention to is that TTFB counts one whole round trip of latency. Armed with this knowledge, we can soon understand why TTFB can often increase so dramatically on mobile. The reason is because mobile networks are, as a rule, high latency connections.
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