Prince of Persia [BLUS30214]

Code:

RPCS3 v0.0.16-12224-64997662 Alpha | HEAD
Intel(R) Core(TM) i7-8700K CPU @ 3.70GHz | 12 Threads | 31.94 GiB RAM | TSC: 3.696GHz | AVX+ | FMA3 | TSX-FA
Operating system: Windows, Major: 10, Minor: 0, Build: 19042, Service Pack: none, Compatibility mode: 0
RSX: Found vulkan-compatible GPU: 'NVIDIA GeForce RTX 2080 Ti' running on driver 466.27.0.0
SYS: Firmware version: 4.87

Game starts fine with default settings, but as soon as the first tutorial combat encounter starts, the FPS tanks to low 20s and the log gets flooded with messages like these (full log attached):

Code:

...
·E 0:05:36.395097 {RSX [0x01e5894]} RSX: [Performance warning] Texture gather routine encountered too many objects!
·E 0:05:36.426361 {RSX [0x01e5894]} RSX: Stale surface at address 0xc1681400 will be deleted
...

This also happens if you adjust VBlank frequency to 120Hz to get 60 FPS. I skimmed through various old builds and discovered that the last known good build for this game is 0.0.14-11749 (making pull #9772 the one to break things). With that build I can continue well into the game past tutorial section.