Performance issue: Intermittent stuttering spikes

[RavenMacDaddy]

Is there any way to produce a log that would help you get to the bottom of the cause?

Things to note:

• I'm running the game with an unlocked frame rate (to get the lowest possible input lag, as well as the best presentation – that's the short reasoning to why).

Although, thanks to the specs below, this doesn't mean that any resources are tanked (e.g., the GPU is running at like 35% utilization tops) which would otherwise be a likely reason to why the issue is occurring.

For reference, the FPS is usually between 600-1100.

• My guess for one of the causes is a larger amount of events or entities being loaded – minimizing and restoring the port produces the same behavior as well; stuttering spikes.

Specs

GPU: GeForce GTX 1080 CPU: AMD Ryzen 5 3600 @ 4.2 GHz RAM: 32 GB DDR4 3000 MHz Storage: Samsung 970 EVO Plus 500 GB NVMe PCIe 3.0 SSD (where both DOOM Retro and the WADs are being read from)

[bradharding]

Could you please confirm a few things? Does it happen in both OpenGL and Direct3D (see the vid_scaleapi CVAR)? If you switch to vanilla mode do you still experience the stutter? Any stutter if you go full widescreen without the HUD?

[RavenMacDaddy]

Simply changing to Direct3D as the scaling API stopped any noticeable stuttering, so something weird is going on with OpenGL.