Graphics performance drop after waking from sleep in Catalina (MacBook Pro)
Start with:


Reset NVRAM / PRAM
Reset the SMC


If your Mac has a double GPU:


Disable the Automatic graphics switching located under System Preferences -&gt; Energy Saver.


If this does not solve the issue:


Boot in safe mode


If the problem persists also there it could be caused by an installed software. At that point you can proceed by exclusion.