How to lessen rust-analyzer's memory usage?

[evbo]

when I start the rust-analyzer server I watch on top memory used rise by more than 2.5 GB.

If I have multiple rust projects open, this quickly crashes VS Code even on a Mac M4.

What can be done to lessen ram usage without too many features turned off?

[lnicola]

The latest version has some fixes for this, so you can try a nightly or disable cache priming in the settings. If your projects are related, you can also put them in a Cargo or Code workspace instead of opening multiple Code instances.

[teoshibin]

I'm trying to look for a solution as well.
I was using rust ace nvim plugin in neovim, RA decided to hog the entire neovim as it uses up 20GBs of RAM, don't have much clue what happened to it, but this only ever happened once, most of the time it is sitting around 2 to 4GBs. Atm I just temprarily moved myself to rustrover... as don't have the time to debug what's wrong with my editor right now.
Perhaps I should try out the nightly version.