A thread you can test
Perceived Performance
1 notes move from the word to a real choice at work — understand it first, then decide whether to use it.
Each note stands alone, or becomes the next step in this thread.
THE QUESTION THIS PAGE ANSWERS
ANSWER FIRSTWhat is Perceived Performance, and which AI decisions does it change?
Same 5-second request races blank freeze, spinner, streaming, and visible steps side by side—feel how identical wall-clock time can differ 3× in feel; then meet three timing quirks of the user's stopwatch This page keeps the related concepts, common mistakes, and practical notes in one reading thread.
First decide whether you are blocked by a definition, a choice, or verification; then choose the closest of the 1 notes below.
Start with “Engineering metrics pass. Why do users still call it slow?,” then restate the conclusion using your own task.
Do not treat every method in a topic as interchangeable. The answer changes with the input, risk, and acceptance bar.
THIS QUESTION THREAD