Rustbolt Lag

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Can confirm. Did a quick test and it does happen. 1920X, Vega 64, 3440x1440 mode 7, 32GB RAM 3200MHz quad channel, NVMe SSD:

Entrance to Great Seal:

Average framerate : 104.7 FPS
1% low framerate : 87.6 FPS
0.1% low framerate : 77.7 FPS

And around 140 FPS in more GPU bound scenario when flying down to the port.

Rustbolt:

Average framerate : 56.9 FPS
1% low framerate : 51.3 FPS
0.1% low framerate : 49.6 FPS

GPU load seems higher but it’s not capped.

Looking at ProcessExplorer in Rustbolt there is some constant I/O activity (which I rarely see in WoW, like when racing around Dalaran):

  • Rust: https://i.imgur.com/DAxgXgx.jpg
  • Dazar: https://i.imgur.com/JXBaSxP.jpg

Looking at frame timeline in Radeon GPU Profiler there is ~double wavefronts and double threads when compared to Great Seal (and the framerate is half so somewhat matches):

  • Rust: https://i.imgur.com/dikF6Cl.png
  • Dazar: https://i.imgur.com/Fsb7W6V.png

On the frame overview only shaded pixels count doubles+:

  • Rust: https://i.imgur.com/mYwTyFI.png
  • Dazar: https://i.imgur.com/xv4tSrk.png

And memory overview for Rust: https://i.imgur.com/7hLHTx5.png

Something is not quite right there, goes YOLO with rendering something.

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