System.Xml.Tests.AttributeReadingPerformanceTests_XmlNodeReader.AttributeDuplicatesCheck_ShortUris_DistinctLocalNames_BelowThreshold failure: Scaling ratio 41.4x exceeded 40.0x limit (input grew 10x). Small (2000): 23 ms, Large (20000): 953 ms.

[elinor-fung]

Build Information

Build: https://dev.azure.com/dnceng-public/cbb18261-c48f-4abb-8651-8cdcb5474649/_build/results?buildId=1541467
Build error leg or test failing: System.Xml.Tests.AttributeReadingPerformanceTests_XmlNodeReader.AttributeDuplicatesCheck_ShortUris_DistinctLocalNames_BelowThreshold
Pull request: #131894

System.Xml.Tests.AttributeReadingPerformanceTests_XmlNodeReader.AttributeDuplicatesCheck_ShortUris_DistinctLocalNames_BelowThreshold [FAIL]
  Scaling ratio 41.4x exceeded 40.0x limit (input grew 10x). Small (2000): 23 ms, Large (20000): 953 ms.
  Stack Trace:
    /_/src/libraries/System.Private.Xml/tests/Misc/AttributeReadingPerformanceTests.cs(90,0): at System.Xml.Tests.AttributeReadingPerformanceTests.AssertLinearScaling(Func`2 generateDoc)
    /_/src/libraries/System.Private.Xml/tests/Misc/AttributeReadingPerformanceTests.cs(62,0): at System.Xml.Tests.AttributeReadingPerformanceTests.AttributeDuplicatesCheck_ShortUris_DistinctLocalNames_BelowThreshold()
       at System.RuntimeMethodHandle.InvokeMethod(ObjectHandleOnStack target, Void** arguments, ObjectHandleOnStack sig, BOOL isConstructor, ObjectHandleOnStack result)
    /_/src/libraries/System.Private.CoreLib/src/System/Reflection/RuntimeMethodInfo.cs(134,0): at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)

Error Message

{
  "ErrorMessage": ["AttributeDuplicatesCheck_ShortUris_DistinctLocalNames_BelowThreshold [FAIL]", "Scaling ratio" ],
  "BuildRetry": false,
  "ExcludeConsoleLog": false
}

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1541467
Error message validated: [AttributeDuplicatesCheck_ShortUris_DistinctLocalNames_BelowThreshold Scaling ratio exceeded 40.0x limit]
Result validation: ❌ Known issue did not match with the provided build.
Validation performed at: 8/6/2026 11:25:51 PM UTC

Known issue validation

Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1541467
Error message validated: [AttributeDuplicatesCheck_ShortUris_DistinctLocalNames_BelowThreshold [FAIL] Scaling ratio]
Result validation: ✅ Known issue matched with the provided build.
Validation performed at: 8/6/2026 11:55:17 PM UTC

Report

Build	Repository	Test	Pull Request
1541467	dotnet/runtime	System.Xml.Tests.AttributeReadingPerformanceTests_XmlNodeReader.AttributeDuplicatesCheck_ShortUris_DistinctLocalNames_BelowThreshold	#131894

Summary

24-Hour Hit Count	7-Day Hit Count	1-Month Count
0	1	1

[elinor-fung]

Test added in #130968 - cc @krwq

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