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perf: use Attribute[] then List in ToAttributeDictionary #4303

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thomhurst merged 1 commit into from
Jan 11, 2026
Merged

perf: use Attribute[] then List in ToAttributeDictionary #4303

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15 changes: 12 additions & 3 deletions TUnit.Core/Helpers/AttributeDictionaryHelper.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -27,12 +27,21 @@ public static IReadOnlyDictionary<Type, IReadOnlyList<Attribute>> ToAttributeDic
var type = attr.GetType();
if (!result.TryGetValue(type, out var list))
{
var newList = new List<Attribute> { attr };
result[type] = newList;
var newCollection = new [] { attr };
result[type] = newCollection;
}
else
{
((List<Attribute>)list).Add(attr);
// first attribute is added to an array, move to a list for addtional values
if (list is Attribute[])
{
var newlist = new List<Attribute> { list[0], attr };
result[type] = newlist;
}
else
{
((List<Attribute>)list).Add(attr);
}
}
}

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