I wonder if he was using a Bluetooth keyboard. I've had to restart the Bluetooth module on my M1 a few times to stop this from happening.

Oh i do remember this happening a long time ago but haven't had that issue in like 6 months.

Although in my case it might have been a specific Language Server Protocol (LSP) package I was using that was consuming 100%+ of my CPU (they fixed it).

Used to have an issue where my bluetooth headphones would annoyingly hiccup every minute or so while listening to music.

I too have had 0 issues with Sublime Text on my 14in M1 Macbook Pro...I've been using the machine since last March and never noticed anything like this...

On some docks / external displays Metal rendering is really slow. Jetbrains IDEs have an option to disable Metal for this reason.

I suspect the Onboard GPU being so new and different contributes to many of these problems.

I use Sublime Text 4 on an M2 Mini and it's mostly perfect. However, a few days ago, it exhibited a strange pattern of behavior where it would freeze every 2 seconds. No beachball, just froze and unfroze repeatedly. I didn't experience this with any other application. I'm all USB - no bluetooth. Looking back, the only thing I changed that day was I turned off my 3rd monitor from the DisplayLink Manager. I have 3 monitors connected (Thunderbolt Display, HDMI, and DisplayLink). I think there's a high chance it's related because I frequently experience a problem where if I disable the 3rd monitor, ST4's editing surface will rotate 90° if I move the window to the top corner of my 2nd monitor. It's a strange sight.

I've since kept the 3rd monitor on and haven't had any problems. So, if anyone has this problem, try fiddling with your DisplayLink connection: perhaps try disconnecting the adapter completely and/or try turning it off/on from the manager.