WEB & TLS
Website Speed Test
Run a lightweight server-side page request with strict size and redirect limits.
39DMultiple locationsChoose the test server below
RUN TEST
Website Speed Test
HOW IT WORKS
About the Website Speed Test
cURL reports the time spent resolving DNS, connecting, negotiating TLS, waiting for the first byte and completing the limited download. This measures server-side network performance rather than browser rendering.
How to use this result
- Run the test from this server.Use a public hostname, address, prefix or ASN in the format requested above.
- Compare test locations.Choose another available 39D node or run a local command to identify location-specific behaviour.
- Correlate related evidence.Use the related tools below to compare DNS, routes, ports, TLS and application responses.
- Keep the time and context.Routing, DNS caches and reputation data change, so record when the result was collected.
Common interpretation issues
- JavaScript execution, image rendering and Core Web Vitals are outside this test.
- Caches and CDNs can make repeated results faster.
- Geographic distance from the test server affects timing.
NEED HELP INTERPRETING THE RESULT?
39D supports business networks, cyber security and managed IT.
For ongoing support or a larger infrastructure project, speak to the 39D team.
Frequently asked questions
Is this the same as Lighthouse?
No. It focuses on network and origin response timings from the server.
Why is TTFB important?
It captures the combined delay before the response begins, including connection and backend processing.