Every remote play client claims to be fast. This one leaves evidence: each session appends a line to a record on your own machine, naming the decoder, the renderer, the requested bitrate and both loss settings, with the timing of each stage of the frame path beside them.
compare-baselines reads two records and prints p50, p99 and maximum per stage with the difference between them. It refuses a comparison whose two halves do not have the same field set, because a row that gained a field silently is two questions and one answer.
The record is a file in your own application data. Nothing is uploaded, there is no account, and no part of the application asks for one. The reason the numbers exist is so that two builds can be compared here, on the hardware that has to run them.