In case your Spotify native app is eating your CPU and memory, I can recommend ncspot.
$ top -b -p $(pidof ncspot)
..
PID RES SHR %CPU %MEM COMMAND
359447 52640 18984 0.0 0.2 ncspot
You can even control it remotely, e.g.:
$ echo playpause | nc -W 1 -U ~/.cache/ncspot/ncspot.sock
#spotify #linux
