TS server significantly slower to initialize when includePackageJsonAutoImports is auto

[OliverJAsh]

🔎 Search Terms

• monorepo
• project references
• package exports
• subpath exports
• includePackageJsonAutoImports
• paths

🕗 Version & Regression Information

• This is the behavior in every version I tried, and I reviewed the FAQ for entries about auto imports.

⏯ Playground Link

No response

💻 Code

My large work project became significantly slower to initialize in VS Code after we migrated from paths in tsconfig.json to exports in package.json (6s before, 12s after).

I dug into the TS server log and noticed AutoImportProvider was now including many more files than before (2474 before, 8442 after).

This led me to typescript.preferences.includePackageJsonAutoImports, which I understand defaults to auto. When I set it to off, initialization time decreases from 12s back down to 6s. Note this doesn't seem to affect the functionality of auto imports.

I can't imagine this would be expected behaviour: 6s of extra initialization with no noticeable gain in functionality.

Unfortunately I can't share a reduced test case for this, but I would be happy to do further debugging if someone could give me guidance.

For context, this project is a monorepo with multiple packages depending on each other. We are also utilizing project references (each package has its own project). The package exports includes many entries.

🙁 Actual behavior

N/A

🙂 Expected behavior

N/A

Additional information about the issue

No response