Rust Glancer: Rust LSP using 100x less RAM

To clarify, author is https://github.com/popzxc, not me! My thoughts are here: https://matklad.github.io/2026/08/21/rust-glancer.html

Waiting for RA to build up the full in memory data structure for a large Rust workspace is so painful. Honestly, I'd just assumed that was the only way and didn't realize Rust Rover was different.

Does anyone have experience using that? Any tradeoffs?

Why don't people explain their acronyms? What is a Rust LSP?