Linkeo un post de REDDIT
For whatever reason, the UI is poorly optimised at 100% and I've learned that setting it to 120% or 80% will decrease lag supremely.
NOTE: If you are worried about being unable to see your chat, just drag and increase the size and right click your tabs to increase font size.
ENJOY!
TL; DR Hacer más grande o más pequeña la UI mejora el fps.