The best perf improvement for slack is to disable animated images in the Accessibility Settings... this also removes some of the fun from Slack. I have suggested to them that they should have a setting to only play gifs when they're hovered-over, but still waiting on that to be implemented...
Other tips I've ritualized, use /collapse very often when on slack, and avoid message reactions with animated gifs. Animated things are why Slack will idle at 5%+. Lots of them and you're going to idle even higher.
Don't leave slack open on a channel where people frequently use /giphy or post lots of animated emojis (#random, etc). Reactions to comments with animated gifs are the worst, because /collapse wont hide them.
In my test locally, a chat window with no animated things is idling at 0-1.5% CPU. I just added 1 animated gif reaction to a comment and it's idling at 4-6%. It's absolutely horrible. I removed that comment and then posted using /giphy, now it's idling at 2-3%. A Slack Helper task started to run at 12%. Ran /collapse and both are back down to 0-1%.
Reacted to a message with 10 animated gifs, slack is idling at 9-12%. Slack Helper is at 26.9%. Brutal. Can't /collapse to fix this, either.
- In Advanced Settings, just turned on "Disable Emoji Spritesheet" and slack is idling at 7-9%, Slack Helper at 27-30%.
- In Accessibility Settings, disabled "Allow animated images and emoji" and Slack is idling at 0-1% and Slack Helper at 0-1%.
Other tips I've ritualized, use /collapse very often when on slack, and avoid message reactions with animated gifs. Animated things are why Slack will idle at 5%+. Lots of them and you're going to idle even higher.
Don't leave slack open on a channel where people frequently use /giphy or post lots of animated emojis (#random, etc). Reactions to comments with animated gifs are the worst, because /collapse wont hide them.
In my test locally, a chat window with no animated things is idling at 0-1.5% CPU. I just added 1 animated gif reaction to a comment and it's idling at 4-6%. It's absolutely horrible. I removed that comment and then posted using /giphy, now it's idling at 2-3%. A Slack Helper task started to run at 12%. Ran /collapse and both are back down to 0-1%.
Reacted to a message with 10 animated gifs, slack is idling at 9-12%. Slack Helper is at 26.9%. Brutal. Can't /collapse to fix this, either.
- In Advanced Settings, just turned on "Disable Emoji Spritesheet" and slack is idling at 7-9%, Slack Helper at 27-30%.
- In Accessibility Settings, disabled "Allow animated images and emoji" and Slack is idling at 0-1% and Slack Helper at 0-1%.