Performance and UX

Performance budget

Also known as: performance budget

Defined limits for resource size or speed metrics that help control website development.

A practical example

A team sets an acceptable script size for a category view.

What should I know?

The budget should match audience devices and needs.

Performance and UX in practice

Assess real users' experiences on their devices. Lab tests help identify causes, while user data shows the scale of a problem. A good website also makes information easy to find and tasks easy to complete.

Related Semly features

See where this concept applies when working with Semly.

Google Search ConsoleConnect search data to Semly. Analyze queries and page performance when planning next steps.AI analyticsCompare visibility, position, sentiment, and brand share in AI answers.

Related terms

LighthouseA tool for automated performance, accessibility, and selected website practice audits.Core Web VitalsUser experience metrics covering main content loading, interaction response, and layout stability.CDNDistributed infrastructure serving resources from locations closer to users, often with caching.

Documentation and further reading

Definition prepared by Semly. Standards and behavior are described by their creators:

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