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Update WindowsBuild.md #37983

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2 changes: 2 additions & 0 deletions docs/WindowsBuild.md
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Expand Up @@ -135,6 +135,8 @@ cmake -B "S:\b\1" ^
ninja -C S:\b\1
```

> **NOTE:** Linking with debug information (`-D LLVM_ENABLE_PDB=YES`) is very memory intensive. When building with parallel jobs, it is possible to consume upwards of 32 GiB of RAM. You can append `-D LLVM_PARALLEL_LINK_JOBS=N -D DLLVM_PARALLEL_LINK_JOBS=N` to reduce the number of parallel link operations to `N` which should help reduce the memory pressure. You may need to set this to a low number (e.g. 1) if you see build failures due to memory exhaustion.

## Running Swift tests on Windows

```cmd
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