Reachability and Latency

How the latency test works

1. 1

   Your browser times sites

   Each round sends every site one small request, most for headers only with nothing downloaded; any response counts as reached.

2. 2

   Warm up, then keep timing

   The first request includes the DNS lookup and the encrypted handshake and is not counted; after that each round times every site once, and no answer within seconds counts as no answer. Monitoring stops after rounds; it pauses while the page is in the background.

3. 3

   Average and jitter over the waveform

   Average and jitter use only the requests the waveform shows, a shorter run on a phone. Jitter is the average change between consecutive timings, where smaller is steadier.

Reading the result

• AverageThe mean time of the answered requests in the waveform.
• JitterThe average change between consecutive timings.
• LatestThe most recent request; a red “—” means it got no answer.
• WaveformEach bar is one request: taller is slower, colored by the ranges on the panel.

Related tests: Exit and Split Routing TestSpeed Test