Lag Spikes after PIE/Standalone runs for a long time

So after PIE or running a Standalone Game from editor, after 20+ minutes the game will start to just randomly spike. I’m unable to really parse the Session Frontend but I’m sure that FBuildAsyncWorker shouldn’t be eating 400% of the frame/ thread and CPU Stall shouldn’t have 18+ instances.

Anybody able to shed some light?

Hi CelestialPanda,

I’m not seeing this behavior locally. Any chance you could provide more information about the project you’re working on? Maybe even send along the project? (You can upload to dropbox, drive, etc and PM me the link)

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We’re pretty sure it was FMOD related. Certain sounds were set to looping but being played as though they weren’t (i.e. we played a new instance of a sound each second). As a result memory got filled and the game lagged.

We’ve sorted it and will be reporting findings to the FMOD team.

Thanks for following up!