perf: use FrozenSet/FrozenDictionary for read-only static lookups by thomhurst · Pull Request #6099 · thomhurst/TUnit (original) (raw)

Convert three read-only static collections queried in hot per-test/per-assembly loops to FrozenSet/FrozenDictionary on net8+ for faster lookups:

• ObjectGraphDiscoverer.SkipTypes (HashSet)
• ReflectionTestDataCollector.ExcludedAssemblyNames (HashSet)
• TupleFactory.TypedFactories (Dictionary<Type, Func<...>>)

Frozen collections are net8+ only, so usage is guarded with #if NET8_0_OR_GREATER; netstandard2.0 retains the existing HashSet/Dictionary. All four TFMs build clean.

Closes #6047

[](/apps/claude)

thomhurst deleted the perf/issue-6047-frozen-collections branch

May 28, 2026 21:02

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May 29, 2026

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