Slower fullscreen performance Linux than Windowed mode

SDL Development
1

I am writing a Vulkan Application and am running into performance issues on Linux Fullscreen.

Ryzen 1700
Gtx 750ti (430.26 drivers)
KDE

A simple scene with 10 meshes at 1920X1080
Fullscreen 1488 FPS
Fullscreen with manually turning off Compositor 1585 FPS
Window 1855 FPS

I was expecting the fullscreen to have higher performance than Window, or at the very least similar performance. On Windows, the fullscreen mode runs at 2000 FPS