How GitBook serves 30,000 sites with sub-second content updates

GitBook hosts 30,000 documentation sites on Vercel, serving 120 million monthly page views with sub-second cache invalidation using Next.js use cache directive and tag-based cache purging.

• •Processes 40,000 cache invalidations daily, each resolved in under 300ms through merge-triggered tag-based revalidation
• •Uses Next.js use cache directive to deduplicate expensive API calls across requests and make cache behavior visible in code
• •Handles 41% AI crawler traffic by designing caching infrastructure for high volume and unpredictable patterns
• •Maintains high cache hit ratio and predictable latency as AI traffic surges 5x year-over-year

This summary was automatically generated by AI based on the original article and may not be fully accurate.