compressord starting up every time I turn on my MacBook

This problem cropped up for me when I used Compressor after not having used it in a long time. I've found that if I launch and quit Compressor after starting my computer then the process goes away but I haven't yet figured out how to make it stop running on boot.

The first place to check is your login items under Users and Groups -> your username in System Preferences. If Compressor isn't in the login items list then look in your LaunchAgents folder at ~/Library/LaunchAgents/ . If you decide to go the second route, make sure to only delete the compressor launch agent.

Note: I don't know what compressor is exactly so this may not be the most accurate.

No, the solution resides in here

/Applications/Compressor.app/Contents/Library/LoginItems

There's what keeping your GPU on all the time through the 'compressord' process.