Ruby LSP runs code actions with every key input with VIM insertion mode

[erickguan]

Description

Ruby LSP Information

### Ruby LSP Information

#### VS Code Version

1.95.3

#### Ruby LSP Extension Version

0.8.14

#### Ruby LSP Server Version

0.22.1

#### Ruby LSP Addons

- Ruby LSP Rails

#### Ruby Version

3.2.4

#### Ruby Version Manager

mise

#### Installed Extensions

<details>
<summary>Click to expand</summary>

- EditorConfig (0.16.4)
- cmake (0.0.17)
- cmake-tools (1.19.52)
- code-spell-checker (4.0.21)
- cpptools (1.22.11)
- cpptools-extension-pack (1.3.0)
- cpptools-themes (2.0.0)
- debugpy (2024.12.0)
- even-better-toml (0.19.2)
- git-graph (1.30.0)
- gitlens (16.0.4)
- prettier-sql-vscode (1.6.0)
- python (2024.20.0)
- ruby-lsp (0.8.14)
- solarized (2.6.0)
- terraform (2.34.0)
- vim (1.28.1)
- vscode-docker (1.29.3)
- vscode-github-actions (0.27.0)
- vscode-pull-request-github (0.100.3)
- vscode-pylance (2024.11.3)
- vscode-yaml (1.15.0)
- vsliveshare (1.0.5941)
</details>

#### Ruby LSP Settings

<details>
<summary>Click to expand</summary>

##### Workspace

```json
{}

User

{
  "enabledFeatures": {
    "codeActions": false,
    "diagnostics": false,
    "documentHighlights": true,
    "documentLink": true,
    "documentSymbols": true,
    "foldingRanges": true,
    "formatting": false,
    "hover": true,
    "inlayHint": true,
    "onTypeFormatting": false,
    "selectionRanges": true,
    "semanticHighlighting": true,
    "completion": true,
    "codeLens": true,
    "definition": true,
    "workspaceSymbol": true,
    "signatureHelp": true,
    "typeHierarchy": true
  },
  "featuresConfiguration": {},
  "addonSettings": {},
  "rubyVersionManager": {
    "identifier": "mise",
    "miseExecutablePath": "/opt/homebrew/bin/mise"
  },
  "customRubyCommand": "",
  "formatter": "auto",
  "linters": null,
  "bundleGemfile": "",
  "testTimeout": 30,
  "branch": "",
  "pullDiagnosticsOn": "both",
  "useBundlerCompose": false,
  "bypassTypechecker": false,
  "rubyExecutablePath": "",
  "indexing": {},
  "erbSupport": true,
  "useLauncher": false,
  "featureFlags": {
    "all": true
  }
}

### Reproduction steps

1. Start the Ruby LSP with VS Code
2. Install VIM plugin
3. Open a Ruby file in a large Rails project (1000k+ files)
4. Insert a charachar with `INSERT` mode
5. The second key stroke takes a few seconds to appear. Switching to normal mode with `ESC` takes a few seconds too.

```ruby
gem 'brakeman', '~> 5.4', require: false
gem 'rubocop', '~> 1.51', require: false

I can see the extension host becomes unresponsive when RubyLSP runs brakeman and rubocop. (CPU 100%).

[vinistock]

Thank you for the bug report! I'm a bit confused though. We don't run brakeman in the Ruby LSP, unless you have some add-on for brakeman.

Also, I'm not sure how the Vim plugin could be impacting this. It's VS Code itself that decides when to trigger code action providers. FWIW, I use the Vim plugin myself.

[andyw8]

@erickguan might you have some config in a .vimrc or similar that the extension is picking up?

[erickguan]

Also, I'm not sure how the Vim plugin could be impacting this. It's VS Code itself that decides when to trigger code action providers. FWIW, I use the Vim plugin myself.

Thanks for your time! From your VIM setup, I was able to find my mistake when debugging again. This is on me. I have an extension fnando.linter runs brakeman and then rubocop.

Name: Linter
Id: fnando.linter
Description: An extension for VSCode that provides linting for multiple languages in on package.
Version: 0.0.19
Publisher: Nando Vieira
VS Marketplace Link: https://marketplace.visualstudio.com/items?itemName=fnando.linter

I used it for YAMLint but failed to capture its existence when I debugged this performance.

When I disabled RubyLSP, the performance was slower but okay. When I enabled RubyLSP, two extensions hogged my CPU.

@erickguan might you have some config in a .vimrc or similar that the extension is picking up?

@andyw8 Thanks for your reply. It's my environmental contamination (M2 Pro).

---

ruby-lsp process on save reaches around 30-50% peak.