Performance branch can have much worst frametime jitter than stable branch when loading many assets in a short period. This can be demonstrated by moving fairly rapidly through some towns. Example result from the benchmark below on my hardware:
```
Perf worst frame: 450ms, 5th worst: 200ms
Stable worst frame: 200ms, 5th worst: 75ms
```
Graphics settings and hardware performance may impact the results. I used my normal settings (close to Standard preset) but with ultra textures to increase the load. Uses about 8GB VRAM here. My test machine has quite poor hardware (i7 4790, 16GB RAM, 1080, SATA SSD) but apparently some people get even worse results on much better gear.