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Get Started Free →Use when auditing slow page loads, heavy assets, or rendering delays related to Keep page load time under 3 seconds. Verify the actual bottleneck in DevTools, Lighthouse, or field data before recommending changes.
| Test case | Without → With | Effect | Δ tokens | Δ turns |
|---|---|---|---|---|
| case-01 | ✗→✓ | ▲ Improved | -11% | 0% |
| case-04 | ✗→✓ | ▲ Improved | 0% | 0% |
| case-08 | ✗→✓ | ▲ Improved | -14% | 0% |
| case-10 | ✗→✓ | ▲ Improved | 44% | 0% |
| case-18 | ✗→✓ | ▲ Improved | -17% | 0% |
Studies show 53% of mobile users abandon sites that take longer than 3 seconds to load—slow pages directly hurt conversions, engagement, and SEO rankings.
Measure the page load time and verify it's under 3 seconds on a standard connection.
Optimize page load time through lazy loading, CDN usage, caching strategies, and resource optimization.
Explain how page load time affects bounce rate, SEO rankings, and user satisfaction.
Review the routes, assets, and loading behavior that affect Keep page load time under 3 seconds. Flag exact files, requests, or rendering steps that add unnecessary network, CPU, or layout cost, and describe the measurement method used to confirm the issue.
For full implementation details, code examples, and framework-specific guidance, see references/rule.md.
Rule page: https://frontendchecklist.io/en/rules/performance/page-load-time
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