i'm having the same issue, a chk into task mgr, spotify were at top in the list of disk utilization and second in memory. i'm now trying w hardware acceleration off, hope it works. but past few days were nightmare, every click in spotify slowed down the whole pc, and sometimes hung so long that i have to forced shutdown.
No that's not the problem I have. My Spotify didn't use any RAM/CPU space, the problem was that Spotify itself was slow to respond to actions. I figured out the problem was AdGaurd (it blocks ads by blocking connections to ad servers) I just whitelisted Spotify from AdGaurd.