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In 2021, engineers from Apple proposed an "RPM" (for revolutions per minute or rounds per minute) metric as a figure of merit related to responsiveness.  Rather than using round-trip times, the metric counts (application-level) request/response times achievable over a fixed timescale.  The idea is that consumers appreciate this because of the general experience that "higher is better".

An important point is that RPM should be measured while the Internet connection is in use.  The authors propose to run several data transfers in parallel while measuring responsiveness.

Implementation

An implementation of the RPM metric is included in the networkQuality tool in macOS 10.15 and higher (and possibly in IOS, to be verified).

References

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