Performance for AI Crawlers
Page performance directly impacts how AI crawlers interact with your site. Faster pages mean more efficient crawling and better coverage of your content.
In this guide
- Why performance matters for AI crawlers
- Key performance metrics
- Server response optimization
- Resource optimization techniques
Why Performance Matters
AI crawlers have time and resource budgets. Slow pages impact crawling in several ways:
Reduced Crawl Volume
If pages take 3 seconds instead of 300ms, crawlers fetch 10x fewer pages in the same time.
Timeout Risks
Very slow pages may timeout, leaving content unindexed entirely.
Incomplete Rendering
Crawlers that render JS may give up before slow resources load.
Key Metrics
| Metric | Target | Impact |
|---|---|---|
| Time to First Byte (TTFB) | < 200ms | How fast server responds |
| First Contentful Paint (FCP) | < 1.8s | When content appears |
| Largest Contentful Paint (LCP) | < 2.5s | When main content loads |
| Total Blocking Time (TBT) | < 200ms | JS execution blocking |
Server Optimization
Enable Compression
Compress responses to reduce transfer time:
# Nginx gzip configuration
gzip on;
gzip_types text/html text/css application/javascript application/json;
gzip_min_length 1000; Use a CDN
Serve content from edge locations closer to crawlers. Major AI crawlers operate from multiple geographic locations.
Implement Caching
Set appropriate cache headers for static resources:
Cache-Control: public, max-age=31536000 # Static assets
Cache-Control: public, max-age=3600 # HTML pages Optimize Database Queries
Slow database queries are often the biggest TTFB bottleneck. Index properly and cache query results.
Resource Optimization
Optimize Images
- • Use modern formats (WebP, AVIF)
- • Serve appropriately sized images
- • Lazy load below-the-fold images
- • Use responsive srcset
Minimize JavaScript
- • Bundle and minify JS files
- • Remove unused code (tree shaking)
- • Defer non-critical scripts
- • Use async loading where possible
Optimize CSS
- • Inline critical CSS
- • Remove unused styles
- • Minify stylesheets
- • Avoid render-blocking CSS
Crawler-Specific Considerations
Avoid Blocking Resources
Don't block CSS/JS in robots.txt. Crawlers may need them to render content properly.
Handle Crawl Spikes
AI crawlers may request many pages quickly. Ensure your infrastructure can handle bursts without degrading performance.
Monitor Bot Performance
Track response times specifically for crawler user agents to identify issues affecting AI indexing.
Testing Tools
PageSpeed Insights
Google's tool for measuring Core Web Vitals and getting optimization suggestions.
WebPageTest
Detailed performance analysis from multiple locations and devices.
Lighthouse
Built into Chrome DevTools, provides comprehensive audits.
Server Logs
Analyze response times for specific crawler user agents.
Key Takeaway
Fast pages get crawled more thoroughly.
Performance optimization isn't just about user experience. It directly impacts how much of your content AI systems can discover and index. Target sub-200ms TTFB and ensure critical content loads quickly.
Sources
- Core Web Vitals | web.dev: Google's performance metrics documentation
- Lighthouse | Chrome Developers: Performance auditing tool
- PageSpeed Insights | Google: Real-world performance measurement