Usually (on laptops anyway) setting the performance governor only marginally increases throughput and/or latency, while significantly increasing power use. This is because the default behavior of ondemand governor is, almost always, to go to max clock speed practically instantly when there’s actual work to do.
In theory it can even have detrimental effect, especially with passive/inadequate cooling (which I assume an Android tablet would have), because the CPU will throttle automatically if it gets too warm, and disabling power saving features means it’ll run generally hotter.


Yeah could be. There’s some latency for sure, the question is whether it’s noticeable. Definitely hard to tell subjectively, and as far as I know, also hard to measure without special equipment. I just think it’s probably not worth it to use the performance governor, even for (say) a laptop connected to a power supply, just because of the extra heat, fan noise, or the potentially earlier throttling. But I guess you have to judge that for yourself.