[Perf] Linux/x64: 3 Regressions on 9/22/2025 7:32:29 PM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | TigerUbuntu
Baseline | [55447bc301e11dfea3cb199ea263428bd62bbfa9](https://github.com/dotnet/runtime/commit/55447bc301e11dfea3cb199ea263428bd62bbfa9)
Compare | [2a9066e3dc2c0a48f6bbbf38d23f3f989322efec](https://github.com/dotnet/runtime/commit/2a9066e3dc2c0a48f6bbbf38d23f3f989322efec)
Diff | [Diff](https://github.com/dotnet/runtime/compare/55447bc301e11dfea3cb199ea263428bd62bbfa9...2a9066e3dc2c0a48f6bbbf38d23f3f989322efec)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in System.Text.Json.Document.Tests.Perf_EnumerateObject

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[PropertyIndexer - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/System.Text.Json.Document.Tests.Perf_EnumerateObject.PropertyIndexer(TestCase%3a%20StringProperties).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Text.Json/Document/EnumerateObject.cs#L59-#L64>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 1.65 μs | 1.75 μs | 1.06 | 0.01 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/09_30_2025/refs/heads/main_x64_ubuntu%2022.04_Regression/System.Text.Json.Document.Tests.Perf_EnumerateObject_001.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/09_30_2025/refs/heads/main_x64_ubuntu%2022.04_Regression/System.Text.Json.Document.Tests.Perf_EnumerateObject.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.Text.Json.Document.Tests.Perf_EnumerateObject*'
```

<details>

### System.Text.Json.Document.Tests.Perf_EnumerateObject.PropertyIndexer(TestCase: StringProperties)

#### 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 | TigerUbuntu
Baseline | [55447bc301e11dfea3cb199ea263428bd62bbfa9](https://github.com/dotnet/runtime/commit/55447bc301e11dfea3cb199ea263428bd62bbfa9)
Compare | [2a9066e3dc2c0a48f6bbbf38d23f3f989322efec](https://github.com/dotnet/runtime/commit/2a9066e3dc2c0a48f6bbbf38d23f3f989322efec)
Diff | [Diff](https://github.com/dotnet/runtime/compare/55447bc301e11dfea3cb199ea263428bd62bbfa9...2a9066e3dc2c0a48f6bbbf38d23f3f989322efec)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in System.Collections.ContainsFalse&lt;String&gt;

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[ICollection - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/System.Collections.ContainsFalse(String).ICollection(Size%3a%20512).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Collections/Contains/ContainsFalse.cs#L80-#L82>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=H4sIAAAAAAAACl2R32/TMBDH3yv1fzj64lZkTVaWUQWMgDIGQntZKng2yaU1cuzKvmwtbP875yQVEi/nX3dff+57BgkIA4GE96I8BcJ2uXHGYEXa2cB7S0rb8FmZgG9L8tru3i2//kuZl/o3FpBfrhbizXRiWE81hJ4Fa0VIusX5KlvlF9nri1fZNlsXl3mRXS/X+dXVOr9+mWVFli3GSo8Hx4WidmSRUt/ZWH/W/emVrfbx3WMT0j2qOqQt050TKmcbvYs/n6xqdTX/IzauPWijIumdq1EUIEijx1okIO47+03bOl5ytnfiOYLcIn3RgZzXlTKfFKkfmvZRR3kd2JN59EvGkAytyj4mPb2MIRlR5bAkI5gclsV08gQH736xgVCi1xgS+NhpU2+52ZJUe0jguzIdyi1/snHsAvp7DJ2hDw/o1Q6nkzR9gsc9NzIqwAsW7ycFsxm5m2NluhpnM0hTuDmypEFwDTTasBbPEFzHg4LQF0cgj7bmqUW/q73yBI/cNcyHBHnGPFbOdK2V/+Oehvsge27OI00GpWD7kJ0+jcc7VKHz2KIlsfgLC4RLi3sCAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=>)</li></ul> | 404.95 μs | 470.71 μs | 1.16 | 0.20 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/09_30_2025/refs/heads/main_x64_ubuntu%2022.04_Regression/System.Collections.ContainsFalse%28String%29_001.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/09_30_2025/refs/heads/main_x64_ubuntu%2022.04_Regression/System.Collections.ContainsFalse%28String%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 'System.Collections.ContainsFalse&lt;String&gt;*'
```

<details>

### System.Collections.ContainsFalse&lt;String&gt;.ICollection(Size: 512)

#### 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 | TigerUbuntu
Baseline | [55447bc301e11dfea3cb199ea263428bd62bbfa9](https://github.com/dotnet/runtime/commit/55447bc301e11dfea3cb199ea263428bd62bbfa9)
Compare | [2a9066e3dc2c0a48f6bbbf38d23f3f989322efec](https://github.com/dotnet/runtime/commit/2a9066e3dc2c0a48f6bbbf38d23f3f989322efec)
Diff | [Diff](https://github.com/dotnet/runtime/compare/55447bc301e11dfea3cb199ea263428bd62bbfa9...2a9066e3dc2c0a48f6bbbf38d23f3f989322efec)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in System.IO.Tests.BinaryReaderTests

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[ReadAsciiChar - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 22.04/System.IO.Tests.BinaryReaderTests.ReadAsciiChar.html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.IO/BinaryReaderTests.cs#L48-#L54>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 13.25 ns | 14.81 ns | 1.12 | 0.07 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/09_30_2025/refs/heads/main_x64_ubuntu%2022.04_Regression/System.IO.Tests.BinaryReaderTests_001.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/09_30_2025/refs/heads/main_x64_ubuntu%2022.04_Regression/System.IO.Tests.BinaryReaderTests.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.IO.Tests.BinaryReaderTests*'
```

<details>

### System.IO.Tests.BinaryReaderTests.ReadAsciiChar

#### 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>

Provide feedback

Saved searches

Use saved searches to filter your results more quickly

Uh oh!

[Perf] Linux/x64: 3 Regressions on 9/22/2025 7:32:29 PM +00:00 #63058

Run Information

Regressions in System.Text.Json.Document.Tests.Perf_EnumerateObject

Repro

System.Text.Json.Document.Tests.Perf_EnumerateObject.PropertyIndexer(TestCase: StringProperties)

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Regressions in System.Collections.ContainsFalse<String>

Repro

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

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Regressions in System.IO.Tests.BinaryReaderTests

Repro

System.IO.Tests.BinaryReaderTests.ReadAsciiChar

ETL Files

Histogram

JIT Disasms

Docs

Metadata

Assignees

Labels

Type

Projects

Milestone

Relationships

Development

Name	Value
Architecture	x64
OS	ubuntu 22.04
Queue	TigerUbuntu
Baseline	55447bc301e11dfea3cb199ea263428bd62bbfa9
Compare	2a9066e3dc2c0a48f6bbbf38d23f3f989322efec
Diff	Diff
Configs	CompilationMode:tiered, RunKind:micro

[Perf] Linux/x64: 3 Regressions on 9/22/2025 7:32:29 PM +00:00 #63058

Description

Run Information

Regressions in System.Text.Json.Document.Tests.Perf_EnumerateObject

Repro

System.Text.Json.Document.Tests.Perf_EnumerateObject.PropertyIndexer(TestCase: StringProperties)

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Regressions in System.Collections.ContainsFalse<String>

Repro

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

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Regressions in System.IO.Tests.BinaryReaderTests

Repro

System.IO.Tests.BinaryReaderTests.ReadAsciiChar

ETL Files

Histogram

JIT Disasms

Docs

Metadata

Metadata

Assignees

Labels

Type

Projects

Milestone

Relationships

Development

Issue actions