Design for Performance Perception
Performance & Reliability · performance
Updated 2026-07-28
- Speed is not only technical. Users judge performance by what they see and feel.
- Optimize perceived speed:
- Show useful content quickly.
- Provide immediate feedback.
- Avoid unnecessary waiting.
- Prevent layout shifts:
- Reserve space for images.
- Avoid moving content after loading.
- Keep important controls stable.
- Prioritize interaction readiness:
- Users should be able to start using the page quickly.
- Avoid blocking the interface unnecessarily.
- Use the correct loading pattern:
- Skeletons for known layouts.
- Progress indicators for measurable tasks.
- Optimistic updates for predictable actions.
- A fast-feeling product reduces uncertainty, not just milliseconds.
Related guides
UX Handbook