Scene view navigation with WASD very laggy

antancestor · Mar 31, 2020

MrSanity said: ↑

After making those changes Unity (I'm using 2018.x but it'll probably work for others) is running perfectly for me! No noticeable stutter when using WASD in scene view or anywhere else for that matter.
Somehow I think this problem may stem from nVidia's power management.
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Man, thx a lot, you nailed it. Completely forgot that Nvidia messing up with drivers (especially with power management) is a common thing. As I checked my defaults, the integrated graphics was preferred for unity and power management mode setting was set to optimal. Changed those two (same way as you showed), set max FPS to 60 and it fixed all lags in Unity.
Do recommend your answer as a universal solution for this problem.

VictorShubin · Jul 8, 2020

x4000 said: ↑

This sounds like a different bug, with a different cause.

I ran into something similar when developing a title in 2012: http://arcengames.com/avww-beta-0-930-bugfixes-are-always-better-when-they-involve-ponies-released/

Except in my case it was on the player side, not editor.

Basically, the editor is being TOO efficient, and the OS is defaulting you to a lower power management state of some sort. That either means running only some of your cores (possible on any computer), or it has decided to run on your integrated GPU rather than your discrete one (basically only possible on laptops, but quite likely on OSX or Windows).

Basically for things that are "lightweight" like word processing, it wants to use the integrated GPU for the purposes of battery savings. Unity is running so efficiently now, apparently, that it is seeing it -- when static -- as being that.

When you start moving the view around, it freaks out because that's suddenly a huge increase in GPU and CPU load compared to "just keep showing the cached view," and so your OS switches over to the heavier-duty GPU.

Or if you only have one GPU, then this is just the same issue but with some of the cores being offline. I don't remember what my fix was in 2012 in the game I was making, but basically I think it involved giving a more consistent load so that the OS would never think that it could be okay in the power-saving mode.

The reason I know this is the case with your scenario is because of the fact that unrelated processes can make the processing smooth. In those cases you're increasing load outside of unity, that tells the OS to kick things into a higher gear, and unity also then benefits.

Most likely this new "bug" is just a matter of unity having become more efficient due to how they now handle IMGUI and UIElements, and there's nothing else going on that is causing enough load to kick processors or GPUs into their non-powersaving modes.

Hopefully they can find an elegant way to tell the OS to give them priority non-powersaving mode without just having to do a bunch of wasted extra-heavy frames or something.
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Such a great reply, thank you. I am on a laptop as well and I am experiencing the same problem (when I watch videos in the background the lag is gone). Really unintuitive and strange behavior.

x4000 · Jul 8, 2020

Glad it's useful! It was baffling to me in 2012 when I ran into it with a game, and it took a number of players working together to help me and another programmer figure out what was up. So I'm glad it's benefiting more people now.

euivtui4h · Jul 22, 2020

This made it better for me (Unity 2019.4.2f2). It being on 'Default' was bad.

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Scene view navigation with WASD very laggy

antancestor

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x4000

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