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36d877be4a
VScode will typically send a `textDocument/semanticTokens/full` request
followed by `textDocument/semanticTokens/range`, and occassionally
request semantic tokens even when we know nothing has changed. Semantic
tokens also get refreshed on each change. Computing semantic tokens is
relatively heavy in TSC, so we should avoid it as much as possible.
Caches the semantic tokens for open documents, to avoid making TSC do
unnecessary work. Results in a noticeable improvement in local
benchmarking
before:
```
Starting Deno benchmark
-> Start benchmarking lsp
- Simple Startup/Shutdown
(10 runs, mean: 383ms)
- Big Document/Several Edits
(5 runs, mean: 1079ms)
- Find/Replace
(10 runs, mean: 59ms)
- Code Lens
(10 runs, mean: 440ms)
- deco-cx/apps Multiple Edits + Navigation
(5 runs, mean: 9921ms)
<- End benchmarking lsp
```
after:
```
Starting Deno benchmark
-> Start benchmarking lsp
- Simple Startup/Shutdown
(10 runs, mean: 395ms)
- Big Document/Several Edits
(5 runs, mean: 1024ms)
- Find/Replace
(10 runs, mean: 56ms)
- Code Lens
(10 runs, mean: 438ms)
- deco-cx/apps Multiple Edits + Navigation
(5 runs, mean: 8927ms)
<- End benchmarking lsp
```
|
||
|---|---|---|
| .. | ||
| testing | ||
| analysis.rs | ||
| cache.rs | ||
| capabilities.rs | ||
| client.rs | ||
| code_lens.rs | ||
| completions.rs | ||
| config.rs | ||
| diagnostics.rs | ||
| documents.rs | ||
| jsr.rs | ||
| language_server.rs | ||
| logging.rs | ||
| lsp_custom.rs | ||
| mod.rs | ||
| npm.rs | ||
| parent_process_checker.rs | ||
| path_to_regex.rs | ||
| performance.rs | ||
| README.md | ||
| refactor.rs | ||
| registries.rs | ||
| repl.rs | ||
| resolver.rs | ||
| search.rs | ||
| semantic_tokens.rs | ||
| text.rs | ||
| tsc.rs | ||
| urls.rs | ||
Deno Language Server
The Deno Language Server provides a server implementation of the
Language Server Protocol
which is specifically tailored to provide a Deno view of code. It is
integrated into the command line and can be started via the lsp sub-command.
This documentation has been moved to the Deno manual.