This is a living document. If you notice something that isn’t captured here, please reach out on Discord

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General Characteristics

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Server Properties

  • Some languages persist a cache to disk. Subsequent startups will be faster
  • Each language is handled by its own independent process
  • Requests are handled asynchronously

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File Symbols

All languages use ast-grep for file symbol extraction:
  • Consistent < 50ms response time across languages and file sizes
  • We control these rules, if you see something off, let us know

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Language-Specific Characteristics

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C/C++ (clangd)

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Performance

  • Long indexing time to startup
  • Persists cache to disk
  • Consistent memory usage (~100 MB)
  • Fast request response

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Known Issues

  • May require restarting lsproxy to initialize cache files. We are working on this: Issue

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Go (gopls)

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Performance

  • Long indexing time to startup

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Known Issues

  • …

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Java (jdtls)

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Performance

  • Long indexing time to startup
  • High memory baseline (500MB+)
  • Persists cache to disk

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Known Issues

  • Cache is not saved to mounted directory, so is lost when container is removed

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JavaScript/TypeScript (typescript-language-server)

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Performance

  • …

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Known Issues

  • …

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PHP (phpactor)

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Performance

  • Long indexing time to startup

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Known Issues

  • …

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Python (jedi-language-server)

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Performance

  • Quick startup
  • Reference requests very slow on large repos

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Known Issues

  • …

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Rust (rust-analyzer)

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Performance

  • …

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Known Issues

  • …