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[Perf] Windows/x64: 92 Regressions on 5/28/2025 4:16:24 PM +00:00 #56576

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@performanceautofiler

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@performanceautofiler

Run Information

Name Value
Architecture x64
OS Windows 10.0.22621
Queue TigerWindows
Baseline e01d8f5df160b9fb047d45b019922b3d5c6bcf5e
Compare e83ee5b8730662773420a65cf04148e6de72aeac
Diff Diff
Configs CompilationMode:tiered, RunKind:micro

Regressions in System.Net.Primitives.Tests.CredentialCacheTests

Benchmark Baseline Test Test/Base Test Quality Edge Detector Baseline IR Compare IR IR Ratio
314.63 ns 435.13 ns 1.38 0.01 False
309.73 ns 413.42 ns 1.33 0.01 False

graph
graph
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.Net.Primitives.Tests.CredentialCacheTests*'

System.Net.Primitives.Tests.CredentialCacheTests.GetCredential_Uri(uriString: "http://notfound", uriCount: 10)

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System.Net.Primitives.Tests.CredentialCacheTests.GetCredential_Uri(uriString: "http://name5", uriCount: 10)

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JIT Disasms

Docs

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


Run Information

Name Value
Architecture x64
OS Windows 10.0.22621
Queue TigerWindows
Baseline e01d8f5df160b9fb047d45b019922b3d5c6bcf5e
Compare e83ee5b8730662773420a65cf04148e6de72aeac
Diff Diff
Configs CompilationMode:tiered, RunKind:micro

Regressions in System.Tests.Perf_Int32

Benchmark Baseline Test Test/Base Test Quality Edge Detector Baseline IR Compare IR IR Ratio
6.71 ns 7.82 ns 1.17 0.03 False
14.85 ns 39.87 ns 2.68 0.05 False
14.69 ns 39.90 ns 2.72 0.04 False
10.81 ns 23.04 ns 2.13 0.03 False

graph
graph
graph
graph
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.Tests.Perf_Int32*'

System.Tests.Perf_Int32.ParseHex(value: "4")

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System.Tests.Perf_Int32.ParseHex(value: "7FFFFFFF")

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System.Tests.Perf_Int32.ParseHex(value: "80000000")

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System.Tests.Perf_Int32.ParseHex(value: "3039")

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JIT Disasms

Docs

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


Run Information

Name Value
Architecture x64
OS Windows 10.0.22621
Queue TigerWindows
Baseline e01d8f5df160b9fb047d45b019922b3d5c6bcf5e
Compare e83ee5b8730662773420a65cf04148e6de72aeac
Diff Diff
Configs CompilationMode:tiered, RunKind:micro

Regressions in System.Text.Json.Serialization.Tests.WriteJson<HashSet<String>>

Benchmark Baseline Test Test/Base Test Quality Edge Detector Baseline IR Compare IR IR Ratio
2.92 μs 3.42 μs 1.17 0.12 False

graph
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.Text.Json.Serialization.Tests.WriteJson&lt;HashSet&lt;String&gt;&gt;*'

System.Text.Json.Serialization.Tests.WriteJson<HashSet<String>>.SerializeToWriter(Mode: SourceGen)

ETL Files

Histogram

JIT Disasms

Docs

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


Run Information

Name Value
Architecture x64
OS Windows 10.0.22621
Queue TigerWindows
Baseline e01d8f5df160b9fb047d45b019922b3d5c6bcf5e
Compare e83ee5b8730662773420a65cf04148e6de72aeac
Diff Diff
Configs CompilationMode:tiered, RunKind:micro

Regressions in System.Tests.Perf_SByte

Benchmark Baseline Test Test/Base Test Quality Edge Detector Baseline IR Compare IR IR Ratio
11.47 ns 12.85 ns 1.12 0.07 False

graph
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.Tests.Perf_SByte*'

System.Tests.Perf_SByte.Parse(value: "127")

ETL Files

Histogram

JIT Disasms

Docs

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


Run Information

Name Value
Architecture x64
OS Windows 10.0.22621
Queue TigerWindows
Baseline e01d8f5df160b9fb047d45b019922b3d5c6bcf5e
Compare e83ee5b8730662773420a65cf04148e6de72aeac
Diff Diff
Configs CompilationMode:tiered, RunKind:micro

Regressions in System.Xml.Linq.Perf_XName

Benchmark Baseline Test Test/Base Test Quality Edge Detector Baseline IR Compare IR IR Ratio
15.49 ns 18.29 ns 1.18 0.01 False
43.62 ns 50.97 ns 1.17 0.04 False

graph
graph
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.Xml.Linq.Perf_XName*'

System.Xml.Linq.Perf_XName.CreateElement

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System.Xml.Linq.Perf_XName.CreateElementWithNamespaceImplicitOperator

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JIT Disasms

Docs

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


Run Information

Name Value
Architecture x64
OS Windows 10.0.22621
Queue TigerWindows
Baseline e01d8f5df160b9fb047d45b019922b3d5c6bcf5e
Compare e83ee5b8730662773420a65cf04148e6de72aeac
Diff Diff
Configs CompilationMode:tiered, RunKind:micro

Regressions in System.Collections.Tests.DictionarySequentialKeys

Benchmark Baseline Test Test/Base Test Quality Edge Detector Baseline IR Compare IR IR Ratio
3.04 ns 4.37 ns 1.44 0.28 False

graph
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.Collections.Tests.DictionarySequentialKeys*'

System.Collections.Tests.DictionarySequentialKeys.TryGetValue_3k_Int_Int

ETL Files

Histogram

JIT Disasms

Docs

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


Run Information

Name Value
Architecture x64
OS Windows 10.0.22621
Queue TigerWindows
Baseline e01d8f5df160b9fb047d45b019922b3d5c6bcf5e
Compare e83ee5b8730662773420a65cf04148e6de72aeac
Diff Diff
Configs CompilationMode:tiered, RunKind:micro

Regressions in System.Collections.ContainsFalse<String>

Benchmark Baseline Test Test/Base Test Quality Edge Detector Baseline IR Compare IR IR Ratio
337.72 μs 487.24 μs 1.44 0.39 False

graph
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.Collections.ContainsFalse&lt;String&gt;*'

System.Collections.ContainsFalse<String>.List(Size: 512)

ETL Files

Histogram

JIT Disasms

Docs

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


Run Information

Name Value
Architecture x64
OS Windows 10.0.22621
Queue TigerWindows
Baseline e01d8f5df160b9fb047d45b019922b3d5c6bcf5e
Compare e83ee5b8730662773420a65cf04148e6de72aeac
Diff Diff
Configs CompilationMode:tiered, RunKind:micro

Regressions in System.Memory.Span<Char>

Benchmark Baseline Test Test/Base Test Quality Edge Detector Baseline IR Compare IR IR Ratio
11.72 ns 12.95 ns 1.11 0.04 False
1.88 ns 4.40 ns 2.34 0.09 False

graph
graph
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.Memory.Span&lt;Char&gt;*'

System.Memory.Span<Char>.StartsWith(Size: 512)

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System.Memory.Span<Char>.Fill(Size: 4)

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Histogram

JIT Disasms

Docs

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


Run Information

Name Value
Architecture x64
OS Windows 10.0.22621
Queue TigerWindows
Baseline e01d8f5df160b9fb047d45b019922b3d5c6bcf5e
Compare e83ee5b8730662773420a65cf04148e6de72aeac
Diff Diff
Configs CompilationMode:tiered, RunKind:micro

Regressions in System.Tests.Perf_Version

Benchmark Baseline Test Test/Base Test Quality Edge Detector Baseline IR Compare IR IR Ratio
52.94 ns 58.97 ns 1.11 0.04 False
28.23 ns 32.43 ns 1.15 0.16 False
42.49 ns 46.09 ns 1.08 0.01 False

graph
graph
graph
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.Tests.Perf_Version*'

System.Tests.Perf_Version.Parse4

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System.Tests.Perf_Version.Parse2

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JIT Disasms

System.Tests.Perf_Version.Parse3

ETL Files

Histogram

JIT Disasms

Docs

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


Run Information

Name Value
Architecture x64
OS Windows 10.0.22621
Queue TigerWindows
Baseline e01d8f5df160b9fb047d45b019922b3d5c6bcf5e
Compare e83ee5b8730662773420a65cf04148e6de72aeac
Diff Diff
Configs CompilationMode:tiered, RunKind:micro

Regressions in System.Collections.CreateAddAndRemove<String>

Benchmark Baseline Test Test/Base Test Quality Edge Detector Baseline IR Compare IR IR Ratio
28.26 μs 31.17 μs 1.10 0.35 False

graph
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.Collections.CreateAddAndRemove&lt;String&gt;*'

System.Collections.CreateAddAndRemove<String>.HashSet(Size: 512)

ETL Files

Histogram

JIT Disasms

Docs

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


Run Information

Name Value
Architecture x64
OS Windows 10.0.22621
Queue TigerWindows
Baseline e01d8f5df160b9fb047d45b019922b3d5c6bcf5e
Compare e83ee5b8730662773420a65cf04148e6de72aeac
Diff Diff
Configs CompilationMode:tiered, RunKind:micro

Regressions in System.Numerics.Tests.Perf_BigInteger

Benchmark Baseline Test Test/Base Test Quality Edge Detector Baseline IR Compare IR IR Ratio
6.32 ns 9.59 ns 1.52 0.08 False
8.72 ns 9.94 ns 1.14 0.02 False
6.17 ns 10.21 ns 1.66 0.16 False

graph
graph
graph
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.Numerics.Tests.Perf_BigInteger*'

System.Numerics.Tests.Perf_BigInteger.Add(arguments: 16,16 bits)

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System.Numerics.Tests.Perf_BigInteger.Equals(arguments: 259 bytes, Same)

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JIT Disasms

System.Numerics.Tests.Perf_BigInteger.Subtract(arguments: 16,16 bits)

ETL Files

Histogram

JIT Disasms

Docs

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


Run Information

Name Value
Architecture x64
OS Windows 10.0.22621
Queue TigerWindows
Baseline e01d8f5df160b9fb047d45b019922b3d5c6bcf5e
Compare e83ee5b8730662773420a65cf04148e6de72aeac
Diff Diff
Configs CompilationMode:tiered, RunKind:micro

Regressions in System.Collections.TryAddDefaultSize<Int32>

Benchmark Baseline Test Test/Base Test Quality Edge Detector Baseline IR Compare IR IR Ratio
7.80 μs 9.25 μs 1.19 0.06 False

graph
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.Collections.TryAddDefaultSize&lt;Int32&gt;*'

System.Collections.TryAddDefaultSize<Int32>.Dictionary(Count: 512)

ETL Files

Histogram

JIT Disasms

Docs

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


Run Information

Name Value
Architecture x64
OS Windows 10.0.22621
Queue TigerWindows
Baseline e01d8f5df160b9fb047d45b019922b3d5c6bcf5e
Compare e83ee5b8730662773420a65cf04148e6de72aeac
Diff Diff
Configs CompilationMode:tiered, RunKind:micro

Regressions in System.Text.Json.Tests.Perf_Reader

Benchmark Baseline Test Test/Base Test Quality Edge Detector Baseline IR Compare IR IR Ratio
62.38 ns 66.09 ns 1.06 0.30 False

graph
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.Text.Json.Tests.Perf_Reader*'

System.Text.Json.Tests.Perf_Reader.ReadSpanEmptyLoop(IsDataCompact: True, TestCase: HelloWorld)

ETL Files

Histogram

JIT Disasms

Docs

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

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