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(to contextualize)
It seems that there are plenty of people lost in interpreting those Dashboard numbers:
https://twitter.com/nayibbukele/status/1442624279028408321@Bukele tried to throw some light, with a moderate success:
“Transacciones por segundo” doesn’t mean that we have 65,437 new transactions every sec, but that the system is processing an average of 65,437 transactions every sec.
Note: In the above statement, nobody knows whether the ',' is a decimal holder or a thousand separator. Visa does something like 1,700 TX/s (thousand separator) according to multiple sources. This therefore strengthens the idea that the ',' is decimal point holder in their Dashboard.
Given the statement, and some other later Tweets on the above referenced link, some TXs take more than a few seconds to complete (some people even mention days on end). Therefore, at a busy point in time, the number will pile up on ongoing TXs, which is what @Bukele is saying that is being measured. That is of course rather different to new TXs/second, especially if the network were to be saturated at the time of the data snapshot, coinciding for example with a peak network time and a heavy pending backlog.
All in all, the indicator has a usefulness to monitor congestion and such, but from my point of view, as an outside reader, I’d be happier with a New TX/day ( + evolution chart).