Visual Studio Code (or whatever the app is called nowadays) has a pretty nasty & long-documented bug where it keeps eating up memory without releasing it. It also hasn't received an update in 6 months, which is a long time in HA terms.
Between that and the fact it highlights false errors in the linter, I wouldn't recommend running it in its current condition. Someone has just released an updated fork of it this week, though it's still in its infancy, so take that into consideration.
Otherwise, unless you're doing some heavy coding, the File Editor app might be more suitable for you.