Course Project Performance Audit Report

Web performance audit of AP News (apnews.com), built as a course project.

• Name: AP News
• URL: https://apnews.com/

AP News is a high-traffic, content-heavy news platform with a mix of article pages, hubs, media-heavy pages, and dynamic features such as search and ads. This makes it a strong candidate for a performance audit because:

• It represents real-world complexity (third-party scripts, ads, media, and frequent content updates).
• It includes different page templates that likely perform differently under load.
• Improvements here would have clear user impact on reading speed, engagement, and accessibility.

Homepage tested: https://apnews.com/ Measurement date: 2026年07月06日 Method: Lighthouse (mobile default + desktop preset)

• Performance: 25
• Accessibility: 79
• Best Practices: 54
• SEO: 85

Performance details

• First Contentful Paint (FCP): 3.4 s
• Largest Contentful Paint (LCP): 17.2 s
• Total Blocking Time (TBT): 4,530 ms
• Cumulative Layout Shift (CLS): 0.064
• Speed Index: 15.7 s

• Performance: 25
• Accessibility: 76
• Best Practices: 54
• SEO: 85

Performance details

• First Contentful Paint (FCP): 9.1 s
• Largest Contentful Paint (LCP): 54.3 s
• Total Blocking Time (TBT): 18,020 ms
• Cumulative Layout Shift (CLS): 0.033
• Speed Index: 22.3 s

1. https://apnews.com/ Main landing page with top stories, ads, and mixed content blocks. Critical for first impressions and overall site performance baseline.

2. https://apnews.com/entertainment Section hub page likely using a category template with many thumbnails and feed items. Useful for comparing section-page rendering against homepage.

3. https://apnews.com/hub/fifa-world-cup Topic hub page with aggregated content. Important for evaluating repeated card layouts, pagination/infinite feeds, and caching behavior.

4. https://apnews.com/photo-gallery/world-cup-photos-mbappe-haaland-jimenez-57fd3b1070ed79152dfa89b7319f6139 Media-heavy gallery page. Key for auditing image optimization, lazy loading, responsive image behavior, and visual stability.

5. https://apnews.com/article/world-cup-schedule-results-news-81645977a722c4020c9644d17589bdbb Typical long-form article page. Essential for measuring real reading experience, ad/script impact, and Core Web Vitals on article templates.

6. https://apnews.com/hub/quizzes Interactive content hub. Useful for testing JavaScript execution costs, interactivity delays, and Total Blocking Time patterns.

7. https://apnews.com/search?q=world+cup Search results page with dynamic query handling. Important for measuring backend/API latency effects and client-side rendering overhead.

8. https://apnews.com/donate Conversion-oriented page where speed directly affects user completion rates. Valuable for evaluating performance impact on business/goal outcomes.

• Baseline report: baseline.md
• Findings report: findings.md
• Executive report: executive-report.md
• Implementer report: implementer-report.md
• Raw Lighthouse results: lighthouse-desktop.json, lighthouse-mobile.json, lighthouse-network-cold.json, lighthouse-network-warm.json

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