That's because Slack is slow. There are even more lightweight open source Slack alternatives described here: http://browsingthenet.blogspot.com/2015/05/slack-is

That's because Slack is slow. There are even more lightweight open source Slack alternatives described here: http://browsingthenet.blogspot.com/2015/05/slack-is-so-slow-here-are-5-lightweight.html http://browsingthenet.blogspot.com/2015/05/slack-is-so-slow-...