Script that I use to run Android Emulator without making my system slow

emulator.sh

#!/bin/bash
if [[ $EUID -ne 0 ]]; then
	echo "This script must be run as root"
	exit 1
fi
export HOME=/home/qti3e/
cd /home/qti3e/Android/Sdk/tools/
./emulator @Nexus_5X_API_26 -gpu on &> /dev/null &
sleep 5
renice -n -30 -p $(ps aux | grep "@Nexus_5X_API_26" | grep -v grep | head -n 1 | awk '{print $2}')