- Worker threads: use (cores - 1-2) instead of cores/2, minimum 4
- Outer upload batch in processReadyTiles: ALL model/texture uploads per
frame share a single command buffer submission + fence wait
- Upload multiple models per finalization step: 8 M2s, 4 WMOs, 16 doodads
per call instead of 1 each (all within same GPU batch)
- Terrain chunks: 64 per step instead of 16
- Skip redundant M2 file I/O: thread-safe uploadedM2Ids_ set lets
background workers skip re-reading+parsing models already on GPU
- processAllReadyTiles (loading screen) and processOneReadyTile also
wrapped in outer upload batches
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