[Perf] Windows/x64: 3 Regressions on 10/7/2025 10:59:59 PM +00:00

[performanceautofiler]

Run Information

Name	Value
Architecture	x64
OS	Windows 10.0.22631
Queue	ViperWindows
Baseline	ff8bbb91c39c0c87ac8cfe0c7ba4e5f88f117bab
Compare	ed6a0099bf0091b16cc1992d87f05978a6fc992b
Diff	Diff
Configs	CompilationMode:tiered, RunKind:micro

Regressions in System.Reflection.Attributes

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio
IsDefinedClassHitInherit - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	314.27 ns	347.03 ns	1.10	0.14	False
IsDefinedClassHit - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	330.70 ns	355.33 ns	1.07	0.09	False
IsDefinedMethodOverrideHit - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	336.33 ns	398.28 ns	1.18	0.10	False

Test Report

Repro

General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Reflection.Attributes*'

System.Reflection.Attributes.IsDefinedClassHitInherit

ETL Files

Histogram

JIT Disasms

System.Reflection.Attributes.IsDefinedClassHit

ETL Files

Histogram

JIT Disasms

System.Reflection.Attributes.IsDefinedMethodOverrideHit

ETL Files

Histogram

JIT Disasms

Docs

Profiling workflow for dotnet/runtime repository
Benchmarking workflow for dotnet/runtime repository

[LoopedBard3]

Likely due to PGO: dotnet/runtime#120369 (Slightly before marked date but within reasonable range of possible causes.