What is Perceived Performance?
How fast an interface feels to the user, regardless of actual load times. Good animation can make a slow operation feel faster than it really is.
real 400 ms · feels like 100 ms
Perceived performance is about how fast an app...
Write it in your own words in the app.
In real work
Improve perceived performance: add a skeleton screen and optimistic UI so the app feels instant. Real load time is 400ms but it should feel like 100ms.
In the illustration
Both chutes take the same 400 ms; the bare one shows nothing until the end, while the other fills at once with skeleton slabs and an optimistic card, and its feels-like dial stops at 100 ms.
Improve perceived performance in your animation library on the checkout button: show the success state at the tap and reconcile with the server in the background.
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