Keystroke lag in TypeScript

Describe the bug
Noticeable keystroke lag when typing in TypeScript files.
Only observed when NativeScript is installed. I don't have issues with other TypeScript projects. Likely caused by many/large .d.ts files.

Ways to stop the lag

• Disable VSCodeVim
• Disable editor.quickSuggestions (This is my best workaround so far)
• Change the language mode to a non-TypeScript language

To Reproduce
Steps to reproduce the behavior:

1. In an empty directory

npm init -y
npm install "@nativescript/types"
touch tsconfig.json
echo '/// <reference path="./node_modules/@nativescript/types/index.d.ts" />' > references.d.ts

2. Open the project in vscode
3. Open index.ts
4. Wait for "Initializing JS/TS language features" in bottom bar to disappear (takes ~1 second)
5. Type "console"

Alternatively, after the file has been opened and js/ts initialized

1. Press ctrl+space to trigger auto-complete
2. Type (Will be delayed until auto-complete finished loading suggestions)

Expected behavior
Typing is smooth and snappy. There are no noticeable delays after pressing a key

Environment (please complete the following information):

• Extension (VsCodeVim) version: 1.21.10
• VSCode version: 1.63.2
• OS: 5.16.2-arch1-1 x86_64 GNU/Linux

All non-default extensions are disabled.

Additional context
Developer Tools Log while typing the letters "le" of "console" (handleKeyEvent() takes >100ms). The slower I type the earlier the slow keystroke occurs. The written word and letters don't matter.

[Extension Host] ModeHandler: debug: handling key=l.
console.ts:137 [Extension Host] Remapper: debug: trying to find matching remap. keys=l. mode=Insert. keybindings=insertModeKeyBindingsMap.
console.ts:137 [Extension Host] Transformer: debug: Adding Transformation {"type":"insertTextVSCode","text":"l","isMultiCursor":false}
console.ts:137 [Extension Host] Extension Startup: debug: Selections: ignoring intermediate selection change: [0, 6; 0, 6]
console.ts:137 [Extension Host] ModeHandler: debug: handleKeyEvent('l') took 211ms
console.ts:137 [Extension Host] ModeHandler: debug: handling key=e.
console.ts:137 [Extension Host] Remapper: debug: trying to find matching remap. keys=e. mode=Insert. keybindings=insertModeKeyBindingsMap.
console.ts:137 [Extension Host] Transformer: debug: Adding Transformation {"type":"insertTextVSCode","text":"e","isMultiCursor":false}
console.ts:137 [Extension Host] Extension Startup: debug: Selections: ignoring intermediate selection change: [0, 7; 0, 7]
console.ts:137 [Extension Host] ModeHandler: debug: handleKeyEvent('e') took 31ms

I have traced the lag down to execute.ts executeTransformations()

      case 'insertTextVSCode':
        const now = Number(new Date());
        await TextEditor.insert(vimState.editor, transformation.text);
        console.log(`insertion took ${Number(new Date()) - now}ms`);
        vimState.cursors[0] = Cursor.FromVSCodeSelection(vimState.editor.selection);
        break;

Thanks for the awesome extension, it has served me well so far!

Reproduce the lag with the NativeScript types setup and the listed VS Code and VSCodeVim versions. Start in execute.ts at executeTransformations(), especially the insertTextVSCode path and TextEditor.insert call, and compare the timing logs while typing or triggering completion. Done means the reproduction no longer causes noticeable keystroke delays without disabling TypeScript features.