Add new viz for showing throughput about qvis HOT 4 OPEN

This would be really useful for the performance tests in the interop runner.

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We used picoquic, where the pacing rate was directly available in the qlog files. The goodput was calculated based on new offset numbers sent over a given time interval (not really correct because it's sender-side and does not consider retransmitted/acknowledged data)...

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Maybe also goodput and pacing rate if available?

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Hello @joergdeutschmann-i7,

I agree pacing rate and goodput are interesting things to be able to look at, though they are (currently) not readily available in qlog files.
Assuming the image you share is a custom viz based on qlog, how did you derive goodput and pacing rate from the qlog data?
If not, do you have any opinion on how we might derive them if they're not literally present in the qlog data?

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