All those Electron apps are extremely slow on my mac (Intel Core 2 Duo mid 2010, 4Gb RAM). I am using Slack web version (in Chrome also) and can't find any difference, except it is just a tab among others.
Atom and Spotify are pretty fast for me on OS X, but slack is both CPU and memory heavy. It idles at between 10 and 30% CPU usage, which is unacceptable.
