[Perf] Linux/x64: 2 Regressions on 7/11/2025 2:36:27 PM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [496af721753fe4f8185ee852a1949102817822ed](https://github.com/dotnet/runtime/commit/496af721753fe4f8185ee852a1949102817822ed)
Compare | [f1867b7eb398068025d5ba8296803de3eb7fb8b6](https://github.com/dotnet/runtime/commit/f1867b7eb398068025d5ba8296803de3eb7fb8b6)
Diff | [Diff](https://github.com/dotnet/runtime/compare/496af721753fe4f8185ee852a1949102817822ed...f1867b7eb398068025d5ba8296803de3eb7fb8b6)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in System.Globalization.Tests.StringEquality

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[Compare_Same_Upper - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/ViperUbuntu/System.Globalization.Tests.StringEquality.Compare_Same_Upper(Count%3a%201024%2c%20Options%3a%20(en-US%2c%20OrdinalIgnoreCase)).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Globalization/StringEquality.cs#L65-#L67>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 737.02 ns | 826.81 ns | 1.12 | 0.01 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/07_15_2025/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Regression/System.Globalization.Tests.StringEquality_001.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/07_15_2025/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Regression/System.Globalization.Tests.StringEquality.html>)

### Repro
General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

```cmd
git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Globalization.Tests.StringEquality*'
```

<details>

### System.Globalization.Tests.StringEquality.Compare_Same_Upper(Count: 1024, Options: (en-US, OrdinalIgnoreCase))

#### ETL Files

#### Histogram

#### JIT Disasms



### Docs

[Profiling workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/profiling-workflow-dotnet-runtime.md)
[Benchmarking workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/benchmarking-workflow-dotnet-runtime.md)

</details>


---


### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [496af721753fe4f8185ee852a1949102817822ed](https://github.com/dotnet/runtime/commit/496af721753fe4f8185ee852a1949102817822ed)
Compare | [f1867b7eb398068025d5ba8296803de3eb7fb8b6](https://github.com/dotnet/runtime/commit/f1867b7eb398068025d5ba8296803de3eb7fb8b6)
Diff | [Diff](https://github.com/dotnet/runtime/compare/496af721753fe4f8185ee852a1949102817822ed...f1867b7eb398068025d5ba8296803de3eb7fb8b6)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in MicroBenchmarks.Serializers.Json_FromStream&lt;MyEventsListerViewModel&gt;

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[DataContractJsonSerializer_ - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/ViperUbuntu/MicroBenchmarks.Serializers.Json_FromStream(MyEventsListerViewModel).DataContractJsonSerializer_.html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/Serializers/Json_FromStream.cs#L112-#L118>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 1.39 ms | 1.64 ms | 1.18 | 0.06 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/07_15_2025/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Regression/MicroBenchmarks.Serializers.Json_FromStream%28MyEventsListerViewModel%29_001.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/07_15_2025/refs/heads/main_x64_ubuntu%2022.04/ViperUbuntu_Regression/MicroBenchmarks.Serializers.Json_FromStream%28MyEventsListerViewModel%29.html>)

### Repro
General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

```cmd
git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'MicroBenchmarks.Serializers.Json_FromStream&lt;MyEventsListerViewModel&gt;*'
```

<details>

### MicroBenchmarks.Serializers.Json_FromStream&lt;MyEventsListerViewModel&gt;.DataContractJsonSerializer_

#### ETL Files

#### Histogram

#### JIT Disasms



### Docs

[Profiling workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/profiling-workflow-dotnet-runtime.md)
[Benchmarking workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/benchmarking-workflow-dotnet-runtime.md)

</details>

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[Perf] Linux/x64: 2 Regressions on 7/11/2025 2:36:27 PM +00:00 #117670

Run Information

Regressions in System.Globalization.Tests.StringEquality

Repro

System.Globalization.Tests.StringEquality.Compare_Same_Upper(Count: 1024, Options: (en-US, OrdinalIgnoreCase))

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Regressions in MicroBenchmarks.Serializers.Json_FromStream<MyEventsListerViewModel>

Repro

MicroBenchmarks.Serializers.Json_FromStream<MyEventsListerViewModel>.DataContractJsonSerializer_

ETL Files

Histogram

JIT Disasms

Docs

Metadata

Assignees

Labels

Type

Projects

Milestone

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Development

Name	Value
Architecture	x64
OS	ubuntu 22.04
Queue	ViperUbuntu
Baseline	496af721753fe4f8185ee852a1949102817822ed
Compare	f1867b7eb398068025d5ba8296803de3eb7fb8b6
Diff	Diff
Configs	CompilationMode:tiered, RunKind:micro

[Perf] Linux/x64: 2 Regressions on 7/11/2025 2:36:27 PM +00:00 #117670

Description

Run Information

Regressions in System.Globalization.Tests.StringEquality

Repro

System.Globalization.Tests.StringEquality.Compare_Same_Upper(Count: 1024, Options: (en-US, OrdinalIgnoreCase))

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Regressions in MicroBenchmarks.Serializers.Json_FromStream<MyEventsListerViewModel>

Repro

MicroBenchmarks.Serializers.Json_FromStream<MyEventsListerViewModel>.DataContractJsonSerializer_

ETL Files

Histogram

JIT Disasms

Docs

Metadata

Metadata

Assignees

Labels

Type

Projects

Milestone

Relationships

Development

Issue actions