IL: map the short-lived metadata-only PE reader - #20489
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This view exists only to parse the PE headers and copy the resources out, and is disposed immediately after, so reading the whole assembly into a managed byte array materialises megabytes to touch a few pages. Mapping it is safe because neither pectxtEager nor pevEager may be captured by the results. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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The cleanup lived in an explicit IDisposable implementation, which Stream.Dispose() never reaches, so getBinaryFile's disposer left the file mapped until the safe handles were finalized. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
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OpenILModuleReader's metadata-only branch — the FCS/IDE path,reduceMemoryUsage = Yes,metadataOnly = Yes— opens a temporary PE reader to parse the headers, locate the metadata directory andcopy the resources out, then throws it away:
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Warm whole-solution, 10 in-process passes