Rust Glancer
Rust LSP that doesn't eat memory for breakfast
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Rust Glancer is a memory efficient LSP for Rust. It uses a different approach compared to rust-analyzer: instead of storing everything in memory and recomputing dynamically, it uses frozen workspaces that can be offloaded to the filesystem. As a result, the LSP gets some performance penalty, but is able to achieve extreme memory efficiency and instant restarts.
Quick start
Check out the docs.