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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
10 min read Prerequisite: Dynamic Content

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.

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