Performance - AI-readiness signals
All 12 signals in the Performance category, with what each tests and why it matters for visibility in AI.
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Does your server respond fast enough for AI crawlers to wait for it?
AI crawlers give up sooner than Google; a slow first byte means your content is silently skipped.
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Do real Chrome users see your pages load fast, respond quickly, and stay stable?
Core Web Vitals measure live user experience; AI agent browsers fail when these scores are poor.
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Does your site score at least 90 out of 100 on Lighthouse mobile performance?
Lighthouse simulates a slow mobile network to predict whether AI agents will time out on your site.
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Are your HTML, CSS, and JavaScript files compressed before being sent to crawlers?
Compression shrinks text files by 70 to 90 percent over the wire; uncompressed sites burn the AI crawler timeout budget.
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Does your server speak HTTP/2 so crawlers can fetch resources in parallel?
HTTP/2 lets crawlers load HTML, CSS, JavaScript, and images over one connection instead of opening many.
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Does your server support HTTP/3 for faster connections on lossy networks?
HTTP/3 runs over QUIC, eliminating connection stalls on flaky mobile and edge connections.
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Does your site serve a favicon so agent browsers do not log a 404 on every page load?
A working favicon prevents repeated 404 errors in agent browsers and makes multi-tab AI workflows recognisable.
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Does your viewport meta tag let mobile agent browsers render your page correctly?
Without a proper viewport tag, AI agents on mobile see a zoomed-out desktop layout with clipped content.
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Does your site declare whether it supports dark mode, light mode, or both?
Declaring color-scheme prevents broken contrast in agent browsers when the user prefers dark mode.
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Does your CSS turn off animations when a user - or AI agent - asks for reduced motion?
Respecting prefers-reduced-motion speeds up AI agents and prevents motion-sickness for sensitive users.
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Is the first focusable element a skip link that jumps straight to main content?
A skip link lets keyboard users and AI agents bypass navigation menus and reach content in one step.
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Does your page pass automated accessibility checks for WCAG 2.2 Level AA?
Axe-core detects accessibility violations that double as broken semantic signals for AI agents.