> Slack is perfectly performant. I wouldn't call Slack performant. It sometimes struggles with basic things such as scrolling channel list. And it always lags

> Slack is perfectly performant. I wouldn't call Slack performant. It sometimes struggles with basic things such as scrolling channel list. And it always lags with repainting window when its resized (when you resize window, extra space is left blank until Slack catches up - this never happens on native apps).