本当はsudo使った方がいいけど諸事情によりsuしか使えない時にCPU-scalingを切ってベンチマークを回す君

benchexec

#!/bin/bash
  
set -eu

if [ $# -lt 1 ]; then
        echo "Usage: benchexec <your command>"
        exit 1
fi

echo "Input your root password to change the CPU governor for disabling CPU-scaling."
read -s -p "Password: " pass

yes "$pass" | su - root -c "cpupower frequency-set --governor performance"
$@
yes "$pass" | su - root -c "cpupower frequency-set --governor powersave"