Performance · Website glossary

Performance budget

Quick answer · What is Performance budget?

A deliberately chosen limit or target used to guide and review a site's performance-related decisions.

IN PRACTICE

Performance budget: an example

A team sets an image-transfer budget for a landing-page template and checks additions against it.

KEEP IN MIND

Budgets are project choices, not universal thresholds; align them with real devices, journeys, and maintenance capacity.

Put the idea to work

Frequently asked questions

What is a practical example of Performance budget?

A team sets an image-transfer budget for a landing-page template and checks additions against it.

Are performance budgets universal thresholds?

Budgets are project choices, not universal thresholds; align them with real devices, journeys, and maintenance capacity.

Which concepts should I read alongside Performance budget?

Lab data: Measurements collected in a controlled or simulated test environment.
Field data: Performance measurements collected from real visits in actual user environments.