Start a stability test
This exploratory mode measures 30 probes per second in each direction between this device and the Jitterglass reference server in Germany for 20 minutes, and in parallel a 30-per-second loop through Cloudflare's relay between two connections on this device. Keep this page open and visible; interruptions are recorded. It does not measure the game server itself.
A 10-second download and a 10-second upload through Cloudflare in Germany, at most 25 MB and 10 MB. Turn it off on a small data plan.
Data use: the probes use about 40 MB over 20 minutes (both paths, including network overhead; measured on a desktop connection), plus at most 35 MB for the speed check. The result shows what was actually used.
Browser results are saved on this device when storage is available. The Germany reference keeps its own session diagnostics, and connections expose your network address to the service. No game traffic is inspected.