Explain what happened
The scorecard gives the human answer first: whether the connection stayed usable when the line was busy.
measurement guide
How to inspect and export your test data
A bufferbloat test result should not be a black box. Every completed Bufferbloat.org scorecard includes a technical details drawer and a CSV export so the measurement can be checked, compared, or taken away from the website.
Run the bufferbloat testOpen the technical details after the result appears.
What the export is for
The scorecard is intentionally readable: grade, assessment, application performance, and a chart. The export is for the next layer down. It lets you inspect the actual values behind that scorecard instead of accepting a single number on trust.
That can be useful when you want to compare repeated runs, document a router or ISP problem, include evidence in a support request, or check whether the result was shaped by one strange run.
What is included
The export contains the same measurement record used by the result page. It includes the raw scored ping samples, phase medians, p95 latency spread, load deltas, throughput estimates, sample counts, method settings, and application performance ratings.
- Raw scored ping samplesComma-separated milliseconds for quiet line, download on, and upload on phases.
- Median ping and loaded deltasThe center of each phase and how much delay download or upload added compared with the quiet line.
- P95 latency spreadThe gap between median ping and the upper-delay behavior in each phase.
- Throughput and method settingsDownload/upload estimates plus the stream counts, payload sizes, warm-up rules, and settling rules used for the run.
Question: what should a transparent browser test let you take away after the scorecard appears?
Show the underlying data
Technical details expose the samples and derived values that led to the grade, assessment, and application performance.
Let you keep the evidence
CSV makes the result usable outside Bufferbloat.org: spreadsheet, support ticket, comparison log, or technical report.
What is deliberately excluded
The CSV export is measurement data, not a user profile. It does not include your IP address, precise location, browser fingerprint, full user-agent string, or device identity. Shared result pages are backed by the same completed-test record rather than a second copy of the result.
The exact list of exported fields is kept in the technical-detail export field reference. The broader retention and privacy notes are in the methodology hub.
try it on your line
Run a test, then open the technical details.
The normal scorecard tells you what the result means. The export gives you the data behind it.