[1.1.101] Performance regression causing severe stuttering

[DrNefario]

Edit: The issue was my bluetooth keyboard, Factorio stutters every time Windows tries (then fails) to connect to it. If your issue is still present 1.1.82 or below it's unrelated to this one since 1.1.83 is the first version with input switching.

On my machine ^1.1.83 has a serious bug that makes the game near unplayable. See the attached videos.
I've tried changing practically every setting I can find, updating the NVIDIA drivers, unplugging my side monitor, multiple restarts, disabling windows hardware GPU scheduling, etc.
The only thing that fixed it was downgrading to 1.1.82 or below.

I'm happy to upload any extra files if you need them.

Both videos are from the demo versions with no settings changed, for some reason most versions in the archive only have the demo available.

Version 1.1.83:


Version 1.1.82 (no issue):


Thanks.

[Panzerknacker]

I have to say I also noticed some strange performance issues on one of my older machines, in the same initial demo level. I never tried the older version of the game on it but since the same system can run Crysis I figured it should be able to run that first empty demo level without stuttering.

For me it particularly helped to disable clouds, animated trees/water and have some others settings on 'Low' (pretty much the default settings were optimal).

Another thing I noticed that the stuttering/framedrops would also intensify massively when having mouse-hover overlays open such as machine properties (in world or items in inventory).

[DrNefario]

While that might be related, this specific performance issue happens no matter what level I play, even the menu simulations have clear stutter in v1.1.83+.

My machine is also fairly capable; an AMD 5800X3D and 2070 super should be plenty for Factorio.

[Panzerknacker]

For me it's also no matter what level I play, in the bigger levels it's even worse.

[Bilka]

1.1.83 added controller support and I recall people reporting stuttering related to controllers in the past (viewtopic.php?p=576844#p576844 108781). So try disconnecting any controllers that you might have connected.

[DrNefario]

Try disconnecting any controllers that you might have connected.

I don't have any plugged in to disconnect, and the only one I use is a DualSense over bluetooth. Should I try unpairing it?

[DrNefario]

Update: It was my keyboard.

I have a bluetooth keyboard that I keep plugged in with USB, and at some point I must've cleared the keyboard's bluetooth pairing because Windows was repeatedly trying and failing to connect to it. Now that I've unpaired the keyboard Factorio is running flawlessly again. Strangely enough this wasn't an issue in any other game I've played, I'm glad to have this solved. Thanks!

[Rseding91]

Is there some way I could reproduce this on my end to see about why the stuttering happens? I assume it's something in the SDL controller logic but without a way to reproduce it, I would just be blindly guessing.

[DrNefario]

It seems like the issue itself is unrelated to bluetooth, but simply that there's a stutter any time a keyboard is added or removed in Windows. You should be able to reproduce the stutter by plugging any keyboard in while the game's running, though it won't be persistent unless you repeatedly plug/unplug it.

Personally I'd be fine with a log message when new inputs are added, it would've made discovering the real issue much faster.