Measurement methodologies
Download and upload speeds
| Measurement protocol | HTTP/1.1 |
| TCP or UDP port used | TCP port 443 |
| Number of connections used simultaneously during the speed test | Starts with 3 connections, then adds additional one after each 90 Mbps step |
| Length of each test (provided the volume threshold has not been reached) | 12 seconds each download and upload |
| Maximum volume of data exchanged | No limit |
| Speed test stream encryption | Yes |
| Information on whether or not slow start has been removed | Yes, first 2 seconds of samples removed |
| Version of the Internet Protocol (IP) and selection method used | Ipv4 only |
| Explanations of the displayed indicators | Results are sampled with 100ms frequency, after the test completion average speed is calculated from the samples as well as from the raw measurements. The higher value of both average calculations is reported as a final result. |
Latency
| Measurement protocol | HTTP/1.1 |
| TCP or UDP port used | TCP port 443 |
| Number of latency unit tests(if overall time-out has not expired) | 10 |
| Number of bytes typically exchanged for each latency unit test | 167 bytes |
| Length of the time-out in seconds, for each latency unit test | 500 ms |
| Length of the time-out in seconds, for all latency test | 5000 ms |
| Latency test stream encryption | Yes |
| Version of the Internet Protocol (IP) and selection method used | Ipv4 only |
| Explanations of the displayed indicators | The result is a median value of the 10 unit latency tests |
Test servers
| Method for selecting the default test server | Latency tests are performed to 3 pre-selected server candidates for a given country. The server with lowest median latency is picked for the rest of the tests. In France we default to Cloudflare CDN only |
| Sponsor (optional) | City | Region | IPv4/IPv6 protocol | Connection capacity1 | Port used | TCP congestion protocol (optional) | Host name | AS (Autonomous System) | Cloudflare | Paris | Île-de-France | IPv4 or IPv6 | CDN | 443 | TCP Cubic | uk.loadingtest.com | AS13335 |
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- When a test server is hosted in a CDN, this test server’s capacity should not be listed.