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docs: add note about max-semi-size to performance section #11200

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Add note about max-semi-size
maschwenk May 10, 2025
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Update docs/troubleshooting/typed-linting/Performance.mdx
maschwenk May 12, 2025
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8 changes: 8 additions & 0 deletions docs/troubleshooting/typed-linting/Performance.mdx
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Expand Up @@ -38,6 +38,14 @@ In particular for typed linting:
- [Performance Tracing](https://github.com/microsoft/TypeScript/wiki/Performance#performance-tracing) can spotlight specific slow types within your project.
- [Using Project References](https://github.com/microsoft/TypeScript/wiki/Performance#using-project-references) -which requires enabling the [new "project service" (`parserOptions.projectService`) in v8](/blog/announcing-typescript-eslint-v8-beta#project-service)- can be helpful to speed up type checking on larger projects.

If none of the above work, you can try adjusting the `--max-semi-space-size` of Node. Increasing the max size of a semi-space can improve performance at the cost of more memory consumption. You can [read more about setting space size in Node.js here](https://nodejs.org/api/cli.html#--max-semi-space-sizesize-in-mib).

You can enable the setting by prepending your ESLint command like:

```bash
NODE_OPTIONS=--max-semi-space-size=256 eslint <rest of your command>
```

## Wide includes in your `tsconfig`

When using type-aware linting, you provide us with one or more tsconfigs.
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