[matthewmacleod]

I don't think it's possible to emphasise this enough.

Slack and Spotify are consistently the worst-performing applications I use frequently, easily by an order of magnitude. Slack manages to absolutely tear through CPU cycles and battery life, while simultaneously being sluggish and shitty to use. Have you ever tried scrolling back in a channel? It's horrifying.

It's got bad enough that I've started to hack together native Mac clients for both in my spare time.