Technically, this comment would be for v1.4.7.0, but I see nothing in the release notes for v1.4.9.0, nor my flights in it, to suggest that performance would be statistically different:
As I reported in detail here:
"The addition of Frame Generation in SU2 has provided significant increase in performance (FPS) to my PC system.
The increase in framerates to above 40 FPS for the majority of a flight has now made enabling Dynamic settings a viable proposition (previously, when framerates rarely reached the high 30’s setting, configuring Dynamic Settings with a Frame Rate Target of 40 FPS made no sense).
Enabling Dynamic settings has resulted in virtually stutter-free flights that now match the smoothness of flights seen in MSFS 2020 SU15.
For my PC system with an Intel Arc 770, I’m rating these two builds as “great”.