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TTFB + CDN + Cache Detection

Server Response Time Checker

Measure your server's Time to First Byte (TTFB), detect CDN and cache status, analyse redirect chains, and get actionable speed improvement recommendations.

3× TTFB MeasurementsMedian AverageCDN DetectionCache StatusRedirect ChainServer HeadersCore Web Vitals RatingSpeed Tips

💡 Runs 3 measurements and uses the median for an accurate result

Tool created by iNet Ventures

TTFB Benchmarks: What Google Considers Good

Google's Core Web Vitals documentation sets clear thresholds for TTFB. These are the benchmarks used in this tool:

0–200msExcellent

Top tier. Achieved by sites using CDN edge caching. Users experience near-instant page start. Fully aligned with Google's "good" Core Web Vitals threshold.

200–500msGood

Acceptable for most sites. Within Google's recommended range. May have room to improve with caching or CDN but won't trigger Core Web Vitals penalties.

500–1000msNeeds Improvement

Below the Google-recommended threshold. Will start to impact LCP scores. Users on mobile connections will notice the delay. Optimisation is strongly recommended.

1000ms+Poor

Critical performance issue. A 1+ second TTFB will significantly delay LCP and make a "Good" Core Web Vitals score nearly impossible. Immediate investigation required.

What Affects Server Response Time

TTFB is the combined result of several server-side and network factors. Understanding which layer is slow is the first step to fixing it:

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Geographic Distance

Light travels at ~200,000 km/s through fibre. A server in the US responding to a user in Australia has a minimum 80ms round-trip — before any processing. A CDN eliminates this by serving from a local edge node.

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Caching Layer

A cached page response takes <5ms. An uncached page requires the server to run PHP/Python, query the database, generate HTML, and then respond — which can take 300-1000ms on a busy shared host.

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Database Query Speed

Every database query adds latency. An unoptimised WordPress site with 50+ plugins can run 200+ database queries per page load. Object caching (Redis/Memcached) stores query results in memory, cutting this to near-zero.

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Server Resources

Shared hosting splits CPU and RAM between hundreds of sites. When a neighbouring site gets traffic spikes, your TTFB suffers. A VPS or dedicated server gives you guaranteed resources and predictable performance.

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Redirect Chains

Each redirect is a full HTTP round-trip before the actual page is served. HTTP → HTTPS + non-www → www = 2 redirects × 200ms each = 400ms of pure latency before a byte of page content is delivered.

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Server-Side Processing

Server-side rendering frameworks, CMS plugins, middleware, and external API calls all add processing time before the first byte can be sent. Identifying the slowest server-side operations via profiling is key.

How to Fix a Slow TTFB: Platform-Specific Guides

📝 WordPress

  • Install WP Rocket or LiteSpeed Cache for full-page caching
  • Enable Redis or Memcached for object/database caching
  • Add Cloudflare free plan (CDN + edge caching)
  • Deactivate unused plugins — each adds overhead
  • Move to a managed host (Kinsta, WP Engine, Cloudways)

▲ Next.js / Vercel

  • Use Static Generation (getStaticProps) wherever possible
  • Enable ISR (Incremental Static Regeneration) for dynamic pages
  • Use Edge Runtime for API routes serving global traffic
  • Check Vercel Analytics for slow serverless function cold starts
  • Use SWR or React Query with stale-while-revalidate caching

⚙️ Apache / Nginx

  • Enable gzip/Brotli compression on the server
  • Add Varnish Cache in front of your origin server
  • Configure proper Cache-Control headers for static assets
  • Enable Keep-Alive connections to reduce TCP overhead
  • Add a CDN (Cloudflare, AWS CloudFront) as a reverse proxy

🛒 Shopify / Ecommerce

  • Shopify's CDN handles most static assets — focus on theme code
  • Minimise liquid rendering complexity in theme templates
  • Defer non-critical app scripts — Shopify apps often add blocking JS
  • Use Shopify's built-in CDN for images (never host them elsewhere)
  • Check for slow third-party scripts in checkout flow

Complete Your Technical SEO Audit

🌐

HTTP Status Checker

Status codes and redirect chains

🚫

Noindex Checker

Full 5-signal indexability check

🔗

Canonical Tag Checker

Detect loops, 404s, and conflicts

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Meta Robots Analyzer

All robots directives explained

Technical SEO Sorted — Now Build Links

A fast server gets you in the game. High-quality backlinks win it. Our blogger outreach team builds real editorial dofollow links from relevant sites.

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Frequently Asked Questions

Everything about server response time, TTFB, and Core Web Vitals