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Optimize HashSet.UnionWith to copy data from another HashSet when empty #122952

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Merged
stephentoub merged 4 commits into from
Jan 12, 2026

Refactor UnionWith test to use MemberData with foreach loops

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Optimize HashSet.UnionWith to copy data from another HashSet when empty #122952

Refactor UnionWith test to use MemberData with foreach loops
78138af
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Azure Pipelines / runtime (Build windows-x64 checked CoreCLR_ReleaseLibraries) succeeded Jan 7, 2026 in 52m 58s

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