Say that again after trying Discord :) It's night and day.

Especially voice/video chat, holy crap Slack is ridiculous. The first time I started a Slack voice chat, I actually had time to disable my extensions and log into my router before I figured that no, it's not a problem on my end, it's just that slow and the damn thing loaded.

Slack is just really bad in terms of performance.

- Startup time feels subpar - I haven't dug into it, but it feels like it's downloading the JS for the app on load every time. Switching between teams is similarly slow on first access.

- Scrolling up to something that happened fairly far back in history can feel really awkward and broken, image loads and ajax fetches can make the scrollbar behaviour really janky (to be fair, I just tried this and it was better than I remember, although still far from perfect)

- Switching rooms takes about a second, even if I was just in that room, which while not horrible, is still a little laggy for something that should be nearly instant if I have the room's content cached.

Overall while it's gotten better, the "native" Slack app still feels very much like a webpage with OS chrome around it (which is what it is, but other apps like VS Code, Atom, and Discord don't give this impression nearly as much)

This is all on the latest Macbook Pro upgraded as much as possible in every respect save the video card.

i7 3770, 32GB RAM, dual SSD and two HDD setup, Windows 10 x64, everything flies, absolutely everything updates before I finish half-blinking my eyes. I have 2-3 Twitch streams running 24/7 and still have 30-50ms in any game I enter.

Yet, Slack manages to have lag between pressing Enter and showing a message. It's baffling to me how almost nobody doesn't seem to have a problem with that. Miranda IM worked much faster when connected to 6 networks... on a machine that was 10x slower than my phone.

Like, come on.

The app is ridiculously slow on my 4 year old laptop. Non-electron apps are always fast and snappy, but slack is almost unusable.

Ony work laptop ( Core2/Duo, 8GB RAM ) Slack in a Firefox tab lags when typing. Incredible in 2017.

It is very much slow. Compare typing a message in slack to typing a message in sublime, or even visual studio. There is a long noticeable delay when sending messages, when changing channels, opening threads, attachments, scrolling, searching.

I've a high end workstation on windows 10, and a gigabit jnternet connection. There's no excuse for the delays we see. Another major issue for me at least is their editing system. If you send a message, and edit it "too soon", the UI pretends to edit it, and some seconds later comes back and gives you a modal dialog saying it failed to apply the edit, and undoes your edit. The delay is _huge_ - 10-20 seconds.

Can't use the electron app anymore b/c it'll consume all memory available on my development machine - I have 16gb worth. It's not consistent in memory consumption either, random times it'll get hungry. The connectivity thing (on debian based linux at least) is a major issue for me; it'll never resync after reconnecting to the internet. Only solution is to turn it off and on again.

Slack takes 10 minutes to start up on my iPad 2.

Granted that it's an older model, but why does an IRC chat program need 10 minutes to run? What is it doing?