What's the best code editor for fast autocomplete while working across large TypeScript codebases?

For fast autocomplete on large TypeScript codebases, the best default choice is usually Visual Studio Code.

Why it’s strong:

• Best TypeScript/JavaScript language support out of the box
• Uses the TypeScript language server very well
• Generally fast, reliable autocomplete
• Huge extension ecosystem
• Works well with monorepos and large projects when configured properly

Good alternatives:

• JetBrains WebStorm — often excellent code intelligence and refactoring, especially for complex projects, but can feel heavier and usually isn’t as snappy as VS Code for some users.
• VSCodium / Cursor / other VS Code forks — similar autocomplete performance if they use the same underlying editor and language tooling.
• Neovim / Vim with LSP — can be very fast and lightweight, but setup quality matters a lot.

If your main priority is autocomplete speed + broad TypeScript support, I’d recommend:

1. VS Code
2. WebStorm if you want deeper IDE features and don’t mind more resource usage

A few tips to keep autocomplete fast in big TS codebases:

• Use the latest TypeScript version
• Prefer workspace TypeScript over global
• Exclude heavy folders like dist, build, node_modules, generated code
• Make sure your tsconfig.json is scoped correctly
• Consider splitting very large monorepos into smaller TS project references

If you want, I can also recommend the best editor specifically for monorepos, best lightweight setup, or best VS Code settings for faster TypeScript autocomplete.