Digging into the logs myself, I found that in the times it was slow, an error like this was added:
Code: Select all
2.246 Error ParallelSpriteLoader.cpp:223: Parallel sprite loading failed (__base__/graphics/decorative/red-desert-decal/red-desert-decal-07.png): .
RAM: 13773/65373 MB, page: 17527/66171 MB, virtual: 87535/8388607 MB, extended virtual: 0 MB
Falling back to normal sprite loading.
Thank you for pointing out Event Tracing for Windows which allowed me to find a possible culprit. Lining up the timestamps in the logs shows that sprite loading fails shortly after a New Process "Nvidia Share.exe" occurs. After disabling the NVidia "In-game overlay" (as titled in Geforce Experience) it now loads quickly without the error.
EDIT: Sadly it seems to load slowly sometimes even when the overlay is disabled.
I wish you luck finding out why that's interrupting your sprite loading. Maybe re-trying without falling back to non-parallel upload solves the issue.