Client-Side UtilityLocal memory execution • Zero server telemetry
Website Response Time & TTFB Latency Probe
Measure website server response times with millisecond precision, including DNS lookup latency, Time to First Byte (TTFB), and full page download duration.
IMaintained by Infrastructure & SEO Desk
Published
Latency Benchmark Target
Quick examples:
Ready to benchmark website speed
Enter any URL above to probe DNS resolution speed, server TTFB latency, and content download duration.
IMaintained by Infrastructure & SEO Desk
Published
Calculation Methodology & Formula
Executes high-resolution timing probes using performance.now() across DNS query resolution, TCP socket connection, HTTP TTFB, and payload transmission phases.
Total Latency = DNS Lookup + TTFB (TCP + TLS + Processing) + Content DownloadWorked Example: Benchmark Cloudflare Edge Response Time
Measure latency and TTFB to https://cloudflare.com.
url:https://cloudflare.com
Expected OutputTotal Time: ~85ms (Fast), DNS: ~12ms, TTFB: ~45ms, Download: ~28ms
Deconstructs connection lifecycle into individual millisecond timing milestones.
Technical Constraints & Limitations
- Private IP networks (127.0.0.1, 10.0.0.0/8, 192.168.0.0/16, etc.) are restricted by SSRF protection.
- Times reflect server-to-server latency from the AuditOptima edge probe location.
Frequently Asked Questions
What is Time to First Byte (TTFB)?
TTFB measures the duration from when the client initiates the HTTP request until the first byte of page content is received from the server. Google Core Web Vitals recommends keeping TTFB below 800ms.
Why does DNS lookup speed matter?
Before a browser can connect to a server, it must translate the domain into an IP address. Slow DNS lookups delay all subsequent HTTP requests, impacting overall site speed.
How can I improve my website response time?
Use an Anycast global CDN (e.g., Cloudflare, CloudFront), enable server-side caching, upgrade server hardware, and optimize backend database queries.