You want better benchmarks look at the ones delivered bya ctual terminal developers, for example:
https://sw.kovidgoyal.net/kitty/performance/#throughput
So although those tests may be more extensive, they're not "better" in every regard.
Of course it's perfectly reasonable to want a benchmark that people can run without needing to build any custom hardware.
Certainly if you want to comprehensively understand terminal emulator performance there are multiple axes along which to measur eit and various tradeoffs involved. But I think nowadays we have much better alternatives to catting large files or running find / both of which have been the go to for measuring terminal performance for most people.