microsoft / microsoft/TypeScript
`invalidateResolutionsOfFailedLookupLocations` hogs the CPU for a large project
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Description
### 🔎 Search Terms
performance invalidateResolutionsOfFailedLookupLocations tsserver
### 🕗 Version & Regression Information
Typescript version 5.8.3
### ⏯ Playground Link
_No response_
### 💻 Code
```ts
// Your code here
```
### 🙁 Actual behavior
I'm using vscode on a large project and the tsserver gets stuck very frequently (every 5 minutes). TSServer process is at max CPU usage. Profiling it revealed that it's spending all of the CPU time inside `invalidateResolutionsOfFailedLookupLocations` function. I'm attaching a trace below.
[vscode-profile-2025-07-12-16-00-06.cpuprofile](https://github.com/user-attachments/files/21196644/vscode-profile-2025-07-12-16-00-06.cpuprofile)
### 🙂 Expected behavior
TSServer not get stuck
### Additional information about the issue
The repo in question is https://github.com/dxos/dxos
To get started:
```
pnpm install && pnpm build
```
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Assessment
This issue has not been assessed yet.