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About Website Response Time Test

Measure HTTP response time (not bandwidth) from multiple global locations. Test full request lifecycle from connection to response.

Website Response Time Test is a specialized version of the Latency Test tool, focused on response-time, http-performance, request-lifecycle.

Key Features

  • Multi-region latency testing
  • Time to First Byte (TTFB)
  • Connection time measurement
  • DNS lookup time
  • Historical comparison

How Website Response Time Test Works

ProbeOps Website Response Time Test tests from 6 global locations to provide comprehensive results. When you run a check, our probe nodes in US East (Virginia), US West (Oregon), EU Central (Helsinki), AP South (Mumbai), CA Central (Canada), AP Southeast (Sydney) simultaneously query the target to identify regional differences and ensure global accessibility.

Results are returned in real-time with detailed breakdowns per region, allowing you to identify location-specific issues that might affect your users in different geographic areas.

Common Use Cases

  • Check if a website is down for everyone or just you
  • Monitor uptime from multiple geographic locations
  • Measure response times and TTFB globally
  • Identify regional outages affecting specific users

Related Tools

You might also find these ProbeOps tools useful for your diagnostics:

API Access

All ProbeOps tools are available via REST API for automation and integration. The Website Response Time Test can be called programmatically from your applications, CI/CD pipelines, or monitoring scripts. See our API documentation for integration guides.

Pricing

Website Response Time Test is available on all ProbeOps plans including our free tier. Free users get 100 probes per month with access to 2 regions. Paid plans starting at $19/month include unlimited regions and higher limits. See pricing details.

Website Response Time Test

Measure HTTP response time (not bandwidth) from multiple global locations. Test full request lifecycle from connection to response.

What This Checks
Multi-region latency testingTime to First Byte (TTFB)Connection time measurementDNS lookup timeHistorical comparison

About Latency Test

Test network latency and round-trip time from 6 global probe locations. Measure connection latency, TCP handshake time, and network path efficiency.

Key Features

Multi-region latency testing

Time to First Byte (TTFB)

Connection time measurement

DNS lookup time

Historical comparison

Also Available via API & MCP Server

Automate latency test checks in your CI/CD pipelines or run them directly from your AI coding agent.

REST API

Single endpoint, JSON response. Integrate into any language or platform.

cURL

curl -X POST https://probeops.com/api/v1/run \
  -H "X-API-Key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"tool": "latency_test", "target": "example.com"}'
Learn more about the API

MCP Server

Works with Claude Code, Cursor, Windsurf, and any MCP-compatible IDE.

Claude Code

> Check the latency test for example.com

Claude uses the probeops_latency_test tool to run
the check from 6 global regions and returns
structured results.
Learn more about the MCP Server

Website response time measures how quickly your server completes an HTTP request—from connection to full response. This is NOT a bandwidth or download speed test; it measures server responsiveness and the complete HTTP transaction lifecycle including DNS, connection, SSL handshake, and data transfer.

Our response time test runs from 6+ global locations, breaking down each component of the HTTP request. You'll see exactly where time is spent: slow DNS resolution, connection delays, SSL overhead, or slow server processing (TTFB). This granular view helps target optimization efforts.

For deeper analysis, use TTFB checker to isolate server-side processing time, or network latency test to measure raw connection latency separate from HTTP overhead. Verify DNS configuration isn't adding unnecessary lookup time.

**Methodology:** Full HTTP request lifecycle measurement from 6 regions: DNS + TCP + SSL + TTFB + transfer, with component-level breakdown.

Common Errors & How to Fix Them

4 relevant issues

What This Means

The server responded but took too long. This affects user experience and may indicate server performance issues.

How to Fix

1) Identify bottleneck: check DNS time, connect time, TTFB separately. 2) If DNS slow: switch to faster DNS provider. 3) If TTFB slow: optimize server-side code, add caching, check database queries. 4) If transfer slow: enable compression (gzip), optimize assets. 5) Consider CDN for geographic distribution.

slowlatencyhigh response timeperformance

What This Means

The server didn't respond within the expected time. Could be server overload, network issues, or firewall blocking.

How to Fix

1) Check if server is reachable: ping example.com. 2) Test specific port: nc -vz example.com 443 -w 5. 3) Check from different location (VPN/proxy). 4) For owners: verify firewall allows traffic (ufw status), check server resources, ensure service is running.

timeoutconnection timeoutno responseunreachable

What This Means

The gateway server didn't receive a timely response from the upstream server. The upstream server is too slow or unresponsive.

How to Fix

1) For site owners: increase timeout values (proxy_read_timeout in nginx). 2) Optimize slow backend code/queries. 3) Check database performance. 4) Add caching layers. 5) Test: curl -I -m 30 https://example.com to check response time.

504gateway timeouttimeoutslow server

What This Means

The website is accessible from some locations but not others. This indicates CDN issues, regional server problems, or DNS propagation delays.

How to Fix

1) Check CDN status page (Cloudflare, Fastly, etc.). 2) Verify DNS propagation: dig example.com @8.8.8.8 vs dig example.com @resolver.different-region.com. 3) Check origin server logs for errors. 4) For CDN issues: purge cache, check origin connectivity. 5) May need to wait for DNS propagation.

partial outageregionalsome regions downcdn issue
See all errors →

Frequently Asked Questions

4 relevant questions

Latency is the time delay between sending a request and receiving the first response. High latency makes websites feel slow and unresponsive. For e-commerce sites, every 100ms of latency can reduce conversions by 1%. Latency affects user experience, SEO rankings, and ultimately your bottom line.

latencybasics

For total page load: under 2 seconds is good, under 1 second is excellent. For TTFB specifically: under 200ms is good, under 100ms is excellent. For API endpoints: under 100ms is expected. Mobile users are less tolerant—aim for even faster times. Google considers Core Web Vitals in rankings, making performance crucial for SEO.

latencyperformancebenchmarks

Total latency includes: DNS lookup (finding the IP address), TCP connection (establishing connection), SSL/TLS handshake (for HTTPS sites), server processing (generating the response), and data transfer (sending the response). Our latency test breaks down each component so you can identify bottlenecks.

latencycomponents

Latency varies by physical distance to the server, network routing efficiency, and CDN coverage. A user in London accessing a server in New York experiences higher latency than someone in Boston. Multi-region latency testing reveals where your performance is weakest and whether your CDN is working effectively.

latencyregions
See all FAQs →

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Last updated: January 27, 2026