I thought I would post this here for the next person.
I’ve been having some lad in obsidian. Not always the same file, happening randomly. It could take a note 2-5 seconds to open.
I chatted in discord: https://discordapp.com/channels/686053708261228577/694233507500916796/842443415349231656
After disabling a LOT of things (you can read the whole chat in discord), we finally figured out the issue was google drive. Even having drive in offline mode (ie, files are on the computer, not streaming every time) it was causing issues.
The solution to my Lag problems was to not use google drive for storing/syncing obsidian.