Heavy stuttering issue in simple 2D game [Windows 10, Nvidia]

[crystalnoir]

Godot version:
Godot 3.1-dev / Godot 2.X

OS/device including version:
PC - Windows 10, GeForce GTX 1060 6 GB, 16 GB RAM.

Issue description:
Stuttering / jitters when moving a 2D Sprite. Reproduced on 2 computers (with nvidia graphic cards, the one above and a laptop), a friend of mine reproduce this issue too.

Steps to reproduce:
I just download the "First project" that we can make in the documentation. I have tested to reproduce the first part of this tutorial to only have the player and nothing else. If I run it without change anything. I have some stuttering at the same as the game run with 60 FPS. The motion is not smooth. I collaborate with a dev to try to reproduce this problem and try to understand the issue. I have made a lot of test (Run from editor, run after compilation without debug mode etc...But when I deleted the animation, all run smoothly.

PS : it seems that physic behaviour make sprite stuttering too (try with kinematic and Area2D node with collision). If I desactivate collision and replace Area2D with a simple node2D there is no stuttering (if I don't play any animation on the player).

Minimal reproduction project:
Here's a minimalist project (that comes from the first game project of the documentation). If I run it, I have some stuttering. If I delete the player animation I have no more stuttering.
FirstGame.zip

[crystalnoir]

Hi, I have updated my report because I tested it on my other computer (home) and the issue is here at the same as I change the animation. So, this is not the animation that causes the issue. I think I believed it because when I saw that it was on my laptop, it has a small screen. Here's a video of the issue (the video is at 60 FPS) :
GodotStutter.zip

[akien-mga]

If the video is an accurate representation of what's on screen in real time, then it's a hell lot more stutter than I've ever seen mentioned in any stutter-related issue here. There must seriously be something wrong with this Windows 10 / GTX 1060 setup (I see quite a few articles on the Internet detailing performance issue on Windows 10 / Nvidia after major Windows updates, but can't tell if it's related).

[akien-mga]

Here's a video of the test project on my system, Mageia 6 x86_64 (Linux), Nvidia GTX 670MX with recent proprietary drivers (390.59). No stutter at all (on Openbox - on KWin the compositor messes things up and there's a very light stutter every 10 s or so).
StutterTest_LinuxNvidia_OK.zip

BTW here's a fixed version of the demo project firstGame_fixed.zip, the original one had files split over three different folders somehow ("firstgame", "firstGame" and "FirstGame").

[Zylann]

The game gives me the same amount of stuttering as in the video.
However, turning vsync off gets rid of the stuttering completely (but the game runs at 4000 fps).
Windows 10 64 bits nVidia GTX 1060 too here.

[RaXaR]

I also tested as @Zylann suggested here and got the same results. I too have Win10 x64 and nVidia GTX 1060.

Edit: I use these drivers from nVidia:
398.11-desktop-win10-64bit-international-whql

[Ranoller]

Win 7 64 bit GLES2 and GLES3 tested, GeForce GTX 660/PCIe/SSE2... no stutters. Turning on Aero, with the 2d editor of godot behind the game results in some little stutter (Godot editor render interfere with the rendering of the game).

However, Godot stuttering is the giant invisible enemy, we all know it is there but we do not want to look very closely because we know that the solution is not simple.

Your issue seems like different physics fixed fps with monitor refresh rate, i see this kind of stutter in monitors that have not same hz that editor configured physics fps, but can be other thing.

[Zylann]

Your issue seems like different physics fixed fps with monitor refresh rate

The demo doesn't uses physics, only a simple _process.

[Ranoller]

True... i say that i only see that heavy stutter in this case, but it´s true that there is no physics process involved. I test changing hz of one of the monitors and no differences, 0 stutter in my gear.

Edit: I got win 7, win 8.1 and win 10 in this computer and take the time to test all. No stutters in win 8.1. I´m testing in win 10 now and is very smooth... no windows problem. Godot is angry with your 1060?

[crystalnoir]

Here's the same test with my laptop. As you can see the problem is here too. But it seems that's less visible but it's here.

Laptop Specs : Windows 10 - Geforce 940M

Here's the Laptop video (it's a 60 FPS video) :
GodotStutterLap.zip

[Ranoller]

Can anyone with the stutter problem try to execute the demo changing in Player.gd _process with _physics_process?

[crystalnoir]

I will test this evening on my home PC this is where I have the problem all the time. But I have a weird thing : This morning, I gave you a video with the project on my laptop and as you can see you have the same kind of stuttering. The problem is that now, if I run it again I don't have this stuttering again, like it's random. And I didn't change anything on my laptop, I worked on it all the morning on a TSE session.

Warning : I talk only for my laptop. On my home PC with GTX 1060 the problem is always here. But on my laptop the problem seems to occur randomly. That's why I think that for now, I will let my laptop on the side for testing purpose and I will test only on my home PC that have the problem all the time, to be able to isolate the "bug".