Is it possible to cache the index results?

[rwols]

It looks like rust-analyzer always starts to re-index the entire project anytime I start it. This can take quite a while. Is there a way to cache this index on disk so that it doesn't do that?

[rwols]

Might need an issue in the rust-analyzer repo. Though I'm no rust expert.

[rchl]

I'll just note that VSCode extension also doesn't seem to be doing any caching. Restarting VSCode reindexes the project.

[Rapptz]

This is unfortunately by design. The indexing is done by cargo metadata and there is a local level of caching from cargo's end, typically with the dependencies so the next time it is faster. However rust-analyzer still needs to build its own data in memory so it knows the project structure and data. Any improvement there would need to be within the server.

[rwols]

Already here I guess rust-lang/rust-analyzer#4712

[rchl]

Not something we would can handle on the package side anyway.