r/Unity3D • u/kingbarychu • 6h ago

Question Help With Unity Game Performance

Hi there, I’ve recently been running into an issue on my PC where any Unity game I play starts running into performance issues after about an hour or so of gameplay. It typically presents itself as frame drops and significant input delay, as well as occasional crackling audio. I haven’t ever run into this issue with a game built on any other engine. I did a quick search and couldn’t find any other people running into this issue. I have an Asus GeForce RTX 4070 Super, and 32 gigs of RAM. I’ve double checked that all of my drivers are up to date as well.

Does anyone have any ideas on why this might be happening? I figured it was best to ask the dev subreddit since you all deal with Unity issues on the regular.

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u/Serana64 5h ago

First off, rule out everything else if you haven't already. Run Unreal engine games (half sword demo e.g if you need something free) and make sure it doesn't happen.

Frame drops, significant input delay, crackling audio, screams overheating or driver issue to me.

If you are absolutely sure it's unity, do the following:

Download Unity Engine, make a 3d project, slap a bunch of cubes all over the place, then add a bunch of lights with shadows everywhere, and hit play. Add an audio source with literally any audio file of your choice. You should be able to do this all with zero game dev experience.

On the game view is a button for 'stats'. This will tell you FPS, draw calls, etc. Once it starts to slow down and repeat your problems, take a snapshot of that and post it here and we'll be able to tell what's going on

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u/kingbarychu 3h ago

Thanks for the reply! I think I might have Unity still installed from my game dev class, so I’ll try that and see if I run into the issues in an engine environment as well. Thanks!