@mareisen issues should be due to your graphics card. You may need to go look through your graphics settings and see if anything is limited. For example, people have found that enabling “Background Application Max Frame Rate” will have impacts on performance within Brave.
You may also want to look through some of the things people have shared at https://github.com/brave/brave-browser/issues/23254
One of the key things is the last comment:
But just so anyone new who finds this thread knows. This is caused by Background Application Max Framerate on NVIDIA. Changethe option in program settings to off and restart brave to fix it.
Wish I found your post about this, would’ve saved me my troubleshooting adventures. This issue has existed for almost a year now apparently.
Edit:
NVIDIA appears to set exceptions for chrome.exe, msedge.exe, and firefox.exe. They didn’t add smaller browsers (Brave and Vivaldi) to this exceptions list.