[Perf] Linux/arm64: 8 Regressions on 8/12/2025 11:42:40 PM +00:00

### Run Information

Name | Value
-- | --
Architecture | arm64
OS | ubuntu 22.04
Queue | AmpereUbuntu
Baseline | [811da242e182f376b4d915ec7abb16c1e852462e](https://github.com/dotnet/runtime/commit/811da242e182f376b4d915ec7abb16c1e852462e)
Compare | [4faabd3922eb3889d20c37cec235f390fe1c389d](https://github.com/dotnet/runtime/commit/4faabd3922eb3889d20c37cec235f390fe1c389d)
Diff | [Diff](https://github.com/dotnet/runtime/compare/811da242e182f376b4d915ec7abb16c1e852462e...4faabd3922eb3889d20c37cec235f390fe1c389d)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in System.Text.Json.Tests.Utf8JsonReaderCommentsTests

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[Utf8JsonReaderCommentParsing - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 22.04/System.Text.Json.Tests.Utf8JsonReaderCommentsTests.Utf8JsonReaderCommentParsing(CommentHandling%3a%20Allow%2c%20SegmentSize%3a%20100%2c%20TestCase%3a%20LongMultiLine).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Text.Json/Utf8JsonReader/Utf8JsonReader.Comments.Tests.cs#L51-#L62>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 17.57 μs | 19.17 μs | 1.09 | 0.00 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_14_2025/refs/heads/main_arm64_ubuntu%2022.04_Regression/System.Text.Json.Tests.Utf8JsonReaderCommentsTests_001.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_14_2025/refs/heads/main_arm64_ubuntu%2022.04_Regression/System.Text.Json.Tests.Utf8JsonReaderCommentsTests.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.Tests.Utf8JsonReaderCommentsTests*'
```

<details>

### System.Text.Json.Tests.Utf8JsonReaderCommentsTests.Utf8JsonReaderCommentParsing(CommentHandling: Allow, SegmentSize: 100, TestCase: LongMultiLine)

#### 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 | arm64
OS | ubuntu 22.04
Queue | AmpereUbuntu
Baseline | [811da242e182f376b4d915ec7abb16c1e852462e](https://github.com/dotnet/runtime/commit/811da242e182f376b4d915ec7abb16c1e852462e)
Compare | [4faabd3922eb3889d20c37cec235f390fe1c389d](https://github.com/dotnet/runtime/commit/4faabd3922eb3889d20c37cec235f390fe1c389d)
Diff | [Diff](https://github.com/dotnet/runtime/compare/811da242e182f376b4d915ec7abb16c1e852462e...4faabd3922eb3889d20c37cec235f390fe1c389d)
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
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[GetCredential_HostPort - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 22.04/System.Net.Primitives.Tests.CredentialCacheTests.GetCredential_HostPort(host%3a%20%22notfound%22%2c%20hostPortCount%3a%2010).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Net.Primitives/CredentialCacheTests.cs#L43-#L52>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 43.30 ns | 57.36 ns | 1.32 | 0.40 | False | | |
|<ul><li>[GetCredential_HostPort - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 22.04/System.Net.Primitives.Tests.CredentialCacheTests.GetCredential_HostPort(host%3a%20%22name5%22%2c%20hostPortCount%3a%2010).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Net.Primitives/CredentialCacheTests.cs#L43-#L52>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 56.92 ns | 66.57 ns | 1.17 | 0.31 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_14_2025/refs/heads/main_arm64_ubuntu%2022.04_Regression/System.Net.Primitives.Tests.CredentialCacheTests_001.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_14_2025/refs/heads/main_arm64_ubuntu%2022.04_Regression/System.Net.Primitives.Tests.CredentialCacheTests_002.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_14_2025/refs/heads/main_arm64_ubuntu%2022.04_Regression/System.Net.Primitives.Tests.CredentialCacheTests.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.Net.Primitives.Tests.CredentialCacheTests*'
```

<details>

### System.Net.Primitives.Tests.CredentialCacheTests.GetCredential_HostPort(host: "notfound", hostPortCount: 10)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Net.Primitives.Tests.CredentialCacheTests.GetCredential_HostPort(host: "name5", hostPortCount: 10)

#### 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 | arm64
OS | ubuntu 22.04
Queue | AmpereUbuntu
Baseline | [811da242e182f376b4d915ec7abb16c1e852462e](https://github.com/dotnet/runtime/commit/811da242e182f376b4d915ec7abb16c1e852462e)
Compare | [4faabd3922eb3889d20c37cec235f390fe1c389d](https://github.com/dotnet/runtime/commit/4faabd3922eb3889d20c37cec235f390fe1c389d)
Diff | [Diff](https://github.com/dotnet/runtime/compare/811da242e182f376b4d915ec7abb16c1e852462e...4faabd3922eb3889d20c37cec235f390fe1c389d)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in System.Xml.Linq.Perf_XElement

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[GetElementWithNamespace - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 22.04/System.Xml.Linq.Perf_XElement.GetElementWithNamespace.html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Xml.Linq/Perf.XElement.cs#L72-#L73>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 68.02 ns | 74.61 ns | 1.10 | 0.06 | False | | |
|<ul><li>[CreateElementWithNamespace - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 22.04/System.Xml.Linq.Perf_XElement.CreateElementWithNamespace.html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Xml.Linq/Perf.XElement.cs#L18-#L19>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 83.25 ns | 96.21 ns | 1.16 | 0.23 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_14_2025/refs/heads/main_arm64_ubuntu%2022.04_Regression/System.Xml.Linq.Perf_XElement_001.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_14_2025/refs/heads/main_arm64_ubuntu%2022.04_Regression/System.Xml.Linq.Perf_XElement_002.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_14_2025/refs/heads/main_arm64_ubuntu%2022.04_Regression/System.Xml.Linq.Perf_XElement.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.Xml.Linq.Perf_XElement*'
```

<details>

### System.Xml.Linq.Perf_XElement.GetElementWithNamespace

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Xml.Linq.Perf_XElement.CreateElementWithNamespace

#### 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 | arm64
OS | ubuntu 22.04
Queue | AmpereUbuntu
Baseline | [811da242e182f376b4d915ec7abb16c1e852462e](https://github.com/dotnet/runtime/commit/811da242e182f376b4d915ec7abb16c1e852462e)
Compare | [4faabd3922eb3889d20c37cec235f390fe1c389d](https://github.com/dotnet/runtime/commit/4faabd3922eb3889d20c37cec235f390fe1c389d)
Diff | [Diff](https://github.com/dotnet/runtime/compare/811da242e182f376b4d915ec7abb16c1e852462e...4faabd3922eb3889d20c37cec235f390fe1c389d)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in System.Collections.CtorFromCollectionNonGeneric&lt;String&gt;

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[Queue - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 22.04/System.Collections.CtorFromCollectionNonGeneric(String).Queue(Size%3a%20512).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Collections/Create/CtorFromCollectionNonGeneric.cs#L34-#L35>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 5.37 μs | 5.98 μs | 1.11 | 0.20 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_14_2025/refs/heads/main_arm64_ubuntu%2022.04_Regression/System.Collections.CtorFromCollectionNonGeneric%28String%29_001.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_14_2025/refs/heads/main_arm64_ubuntu%2022.04_Regression/System.Collections.CtorFromCollectionNonGeneric%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.CtorFromCollectionNonGeneric&lt;String&gt;*'
```

<details>

### System.Collections.CtorFromCollectionNonGeneric&lt;String&gt;.Queue(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 | arm64
OS | ubuntu 22.04
Queue | AmpereUbuntu
Baseline | [811da242e182f376b4d915ec7abb16c1e852462e](https://github.com/dotnet/runtime/commit/811da242e182f376b4d915ec7abb16c1e852462e)
Compare | [4faabd3922eb3889d20c37cec235f390fe1c389d](https://github.com/dotnet/runtime/commit/4faabd3922eb3889d20c37cec235f390fe1c389d)
Diff | [Diff](https://github.com/dotnet/runtime/compare/811da242e182f376b4d915ec7abb16c1e852462e...4faabd3922eb3889d20c37cec235f390fe1c389d)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in System.Text.Json.Serialization.Tests.WriteJson&lt;HashSet&lt;String&gt;&gt;

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[SerializeToUtf8Bytes - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 22.04/System.Text.Json.Serialization.Tests.WriteJson(HashSet(String)).SerializeToUtf8Bytes(Mode%3a%20SourceGen).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Text.Json/Serializer/WriteJson.cs#L78-#L79>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 3.97 μs | 4.29 μs | 1.08 | 0.00 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_14_2025/refs/heads/main_arm64_ubuntu%2022.04_Regression/System.Text.Json.Serialization.Tests.WriteJson%28HashSet%28String%29%29_001.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_14_2025/refs/heads/main_arm64_ubuntu%2022.04_Regression/System.Text.Json.Serialization.Tests.WriteJson%28HashSet%28String%29%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.Text.Json.Serialization.Tests.WriteJson&lt;HashSet&lt;String&gt;&gt;*'
```

<details>

### System.Text.Json.Serialization.Tests.WriteJson&lt;HashSet&lt;String&gt;&gt;.SerializeToUtf8Bytes(Mode: SourceGen)

#### 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 | arm64
OS | ubuntu 22.04
Queue | AmpereUbuntu
Baseline | [811da242e182f376b4d915ec7abb16c1e852462e](https://github.com/dotnet/runtime/commit/811da242e182f376b4d915ec7abb16c1e852462e)
Compare | [4faabd3922eb3889d20c37cec235f390fe1c389d](https://github.com/dotnet/runtime/commit/4faabd3922eb3889d20c37cec235f390fe1c389d)
Diff | [Diff](https://github.com/dotnet/runtime/compare/811da242e182f376b4d915ec7abb16c1e852462e...4faabd3922eb3889d20c37cec235f390fe1c389d)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in System.Reflection.Metadata.Perf_TypeName

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[TryParse_Invalid - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 22.04/System.Reflection.Metadata.Perf_TypeName.TryParse_Invalid(input%3a%20%22Wrong.Syntax%5b%5b%5d%5d%22).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Reflection.Metadata/Perf.TypeName.cs#L54-#L56>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 40.25 ns | 45.40 ns | 1.13 | 0.06 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_14_2025/refs/heads/main_arm64_ubuntu%2022.04_Regression/System.Reflection.Metadata.Perf_TypeName_001.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_14_2025/refs/heads/main_arm64_ubuntu%2022.04_Regression/System.Reflection.Metadata.Perf_TypeName.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.Reflection.Metadata.Perf_TypeName*'
```

<details>

### System.Reflection.Metadata.Perf_TypeName.TryParse_Invalid(input: "Wrong.Syntax[[]]")

#### 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>

Name	Value
Architecture	arm64
OS	ubuntu 22.04
Queue	AmpereUbuntu
Baseline	811da242e182f376b4d915ec7abb16c1e852462e
Compare	4faabd3922eb3889d20c37cec235f390fe1c389d
Diff	Diff
Configs	CompilationMode:tiered, RunKind:micro

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio
GetCredential_HostPort - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	43.30 ns	57.36 ns	1.32	0.40	False
GetCredential_HostPort - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	56.92 ns	66.57 ns	1.17	0.31	False

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio
GetElementWithNamespace - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	68.02 ns	74.61 ns	1.10	0.06	False
CreateElementWithNamespace - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	83.25 ns	96.21 ns	1.16	0.23	False

[Perf] Linux/arm64: 8 Regressions on 8/12/2025 11:42:40 PM +00:00 #118739

Description

Run Information

Regressions in System.Text.Json.Tests.Utf8JsonReaderCommentsTests

Repro

System.Text.Json.Tests.Utf8JsonReaderCommentsTests.Utf8JsonReaderCommentParsing(CommentHandling: Allow, SegmentSize: 100, TestCase: LongMultiLine)

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Regressions in System.Net.Primitives.Tests.CredentialCacheTests

Repro

System.Net.Primitives.Tests.CredentialCacheTests.GetCredential_HostPort(host: "notfound", hostPortCount: 10)

ETL Files

Histogram

JIT Disasms

System.Net.Primitives.Tests.CredentialCacheTests.GetCredential_HostPort(host: "name5", hostPortCount: 10)

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Regressions in System.Xml.Linq.Perf_XElement

Repro

System.Xml.Linq.Perf_XElement.GetElementWithNamespace

ETL Files

Histogram

JIT Disasms

System.Xml.Linq.Perf_XElement.CreateElementWithNamespace

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Regressions in System.Collections.CtorFromCollectionNonGeneric<String>

Repro

System.Collections.CtorFromCollectionNonGeneric<String>.Queue(Size: 512)

ETL Files

Histogram

JIT Disasms

Docs

Run Information

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

Repro

System.Text.Json.Serialization.Tests.WriteJson<HashSet<String>>.SerializeToUtf8Bytes(Mode: SourceGen)

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Regressions in System.Reflection.Metadata.Perf_TypeName

Repro

System.Reflection.Metadata.Perf_TypeName.TryParse_Invalid(input: "Wrong.Syntax[[]]")

ETL Files

Histogram

JIT Disasms

Docs

Metadata

Metadata

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