My game is lagging with the windowed mode and i wanna know if there is a way to have livesplit on top of a fullscreen portal. I have no idea about what the type of my lag is and what causes it but whenever I have it windowed it starts to constantly freeze and plays the same sounds like 3-4 times.

My pc.

16GB RAM

Intel core i5 10400

GeForce GTX 1650