44 lines
2.6 KiB
Diff
44 lines
2.6 KiB
Diff
# UNDF: UNDF-2026-000000059
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diff --git a/src/EFCore/Metadata/Conventions/ForeignKeyPropertyDiscoveryConvention.cs b/src/EFCore/Metadata/Conventions/ForeignKeyPropertyDiscoveryConvention.cs
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index xxxxxxx..xxxxxxx 100644
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--- a/src/EFCore/Metadata/Conventions/ForeignKeyPropertyDiscoveryConvention.cs
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+++ b/src/EFCore/Metadata/Conventions/ForeignKeyPropertyDiscoveryConvention.cs
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@@ -496,14 +496,17 @@ namespace Microsoft.EntityFrameworkCore.Metadata.Conventions;
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foreach (var key in dependentEntityType.GetKeys())
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{
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var isKeyContainedInForeignKey = true;
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+ // efcore-0003 fix: build a HashSet once from foreignKeyProperties so that
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+ // key.Properties[i] lookup is O(1) instead of O(FK_props) per iteration.
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+ // Without fix: O(keys × key_props × fk_props) model-build cost.
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+ var foreignKeyPropertySet = foreignKeyProperties != null
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+ ? new HashSet<IConventionProperty>(foreignKeyProperties, ReferenceEqualityComparer.Instance)
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+ : null;
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// ReSharper disable once LoopCanBeConvertedToQuery
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// ReSharper disable once ForCanBeConvertedToForeach
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for (var i = 0; i < key.Properties.Count; i++)
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{
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- if (!foreignKeyProperties.Contains(key.Properties[i]))
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+ if (foreignKeyPropertySet == null || !foreignKeyPropertySet.Contains(key.Properties[i]))
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{
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isKeyContainedInForeignKey = false;
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break;
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}
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}
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@@ -742,10 +742,13 @@ namespace Microsoft.EntityFrameworkCore.Metadata.Conventions;
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public virtual void ProcessKeyAdded(IConventionKeyBuilder keyBuilder, IConventionContext<IConventionKeyBuilder> context)
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{
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var key = keyBuilder.Metadata;
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foreach (var foreignKey in key.DeclaringEntityType.GetDerivedTypesInclusive()
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.SelectMany(t => t.GetDeclaredForeignKeys()).ToList())
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{
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- if (key.Properties.All(p => foreignKey.Properties.Contains(p))
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+ // efcore-0003 fix: build HashSet once per foreignKey so key.Properties.All()
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+ // is O(key_props) not O(key_props × fk_props).
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+ var fkPropsSet = new HashSet<IConventionProperty>(foreignKey.Properties, ReferenceEqualityComparer.Instance);
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+ if (key.Properties.All(p => fkPropsSet.Contains(p))
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&& (!foreignKey.IsUnique || foreignKey.DeclaringEntityType.BaseType != null))
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{
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foreignKey.Builder.HasForeignKey((IReadOnlyList<IConventionProperty>?)null);
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}
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}
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}
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