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If the mode were attainable in a realistic end-user scenario, there would be no point in detecting the benchmark tool in the first place. A high CPU load (like from a benchmark) would kick the CPU up into high performance mode and that would be that.

I would guess that the high-performance mode drains the battery so quickly, or creates so much heat, that it's impractical for general use.

You would guess but you're probably wrong. The logic of your response is terribly flawed. Reboot and try again.

>And you know this based on what

Based on the fact that they are Samsung. That they aren't transparent about what they are doing. That there is no evidence that these optimization kick in in other contexts.

They are doing something to fuck around with benchmark numbers, the onus is on them to explain it and be upfront about it.

It secretly 'guarantees' that the benchmarks don't run under real-world conditions. That is fraud.