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Low FPS in editor preview mode.

I have an odd issue. 95% of the time when I hit play-in-preview, I get 15-25 fps performance. In about 5% of the cases it will run at 120fps.

When packaged the game runs at full speed (75-120fps).

What could be causing this?

Product Version: UE 4.16
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asked Dec 29 '17 at 08:34 PM in Using UE4

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Hard to say, if you're running an Nvidia card, consider disabling the GeForce experience overlay. It's been proved to cause conflicts on some machines.

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answered Dec 29 '17 at 09:25 PM

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avatar image mxnko Mar 08 '18 at 05:32 PM

Wow, that did it. Thank you.

avatar image DavidM Jul 22 '18 at 05:11 PM

I didn't change anything for me. Editor FPS is still around 30 (40ms) but it runs smooth ingame.

avatar image mxnko Jul 22 '18 at 06:00 PM

It kept appearing and disappearing thoughout 4.17.x, 4.18.x.

Running 4.19.2 now - its completely gone. Always 120 (I capped it at 120). Overall - the best release so far for me. Fast, 2 crashes in months, and very very fast.

avatar image DavidM Jul 22 '18 at 06:41 PM

In a nearly empty map I also get 120. In my main project map it's 30fps. I don't know which objects in particular slow it down. I was hiding all sorts of objects, but nothing really had a big impact. Except when I had everything, it goes up to 90-100fps.

I'm now using the "far view plane" set to 30000, so I get 60fps, which is good for working.

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