PR Summary

• Check cached file attributes before inspecting detailed reparse-point metadata in NameString.
• Avoid one FindFirstFile query per ordinary item when formatting directory listings, which is particularly expensive on SMB shares.
• Add a regression test proving that cached non-reparse metadata avoids reopening the path.

PR Context

Fixes #27088.

IsReparsePointLikeSymlink must inspect the reparse tag to distinguish symbolic links and junctions from cloud-drive placeholders. Default formatting previously invoked that expensive check for every item, including ordinary non-links. NameString now uses the already-populated Attributes metadata to short-circuit ordinary items while preserving detailed classification for actual reparse points.

Benchmark

Measured 4,897 entries over the local UNC path \\localhost\c$\Windows\System32. Each result is the median of three warmed-up runs.

A same-binary control using the fixed debug build isolates the avoided operation:

This confirms that the approximately 3.9-second cost came from calling FindFirstFile once per item. Absolute formatting times vary between release and debug builds, but the per-item SMB query is eliminated.

PR Checklist

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• Breaking changes
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• Testing - New and feature
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