Very large vec literals hang rust-analyzer

The crate spm_precompiled has a huge vec literal (~15,000 integers) in its current released version on crates.io:

https://github.com/huggingface/spm_precompiled/blob/81b911a362adef3ad3cc6d5835d2980690dbb871/src/tests.rs#L69

This has been fixed in https://github.com/huggingface/spm_precompiled/pull/5, but not yet released. As a result, any project that transitively depends on spm_precompiled hangs when rust-analyzer indexes all its dependencies at startup.

spm_recompiled is a dependency of some relatively popular crates, particularly tokenizers: https://crates.io/crates/spm_precompiled/reverse_dependencies, which is where this issue was noticed: https://github.com/huggingface/tokenizers/issues/1917

I'm not sure if there's anything we can do on the rust-analyzer side, but I don't see any issues discussing this so I figured I'd at least flag it.

How big a vec literal is too big for rust-analyzer?

Start by reproducing rust-analyzer indexing with the released spm_precompiled dependency and its large vec literal in src/tests.rs#L69, using the linked tokenizers context. Compare behavior with the fix in spm_precompiled pull request #5. Done means identifying whether rust-analyzer can mitigate the hang or documenting why the dependency must be released first.