Your app is fast for you and slow for everyone else — the reason is geography

Latency is the wait between a request and its answer, and distance is the biggest cause. Why far-away users feel the lag, and the one thing that…

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Latency is the wait between a request and its response

You now understand

Distance is the biggest cause; slow connections and slow server work add more

You now understand

Serving from a nearby edge or CDN removes most of the felt slowness

What this means for your app

If testers say your app is slow but it's fast for you, latency and location are the prime suspects. Serving static files from a CDN, and not making users wait on slow work (the next lesson), removes…

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Your app is fast for you and slow for everyone else — the reason is geography

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