Has anyone turned off FileVault after it has completed? I have a 1TB SSD in a 15" Mac Book Pro

It took about 30 hrs to Encrypt, which during, the computer was virtually unusable. It just finished with that and now it says it is optimizing with 5 DAYS!!!! remaining. I wish I never agreed to do it. Has anyone turned it off after the whole process is complete and if so how long did that take?
Just go to System Preferences, click on Security, then FileVault then click the button that says turn off FileVault. But if you have it on, I would recommend leaving it on. It increases your security, and may take a while to turn off (decrypt) your files, but it's your choice.