[Perf] Linux/arm64: 6 Regressions on 3/24/2025 4:04:18 PM +00:00

### Run Information

Name | Value
-- | --
Architecture | arm64
OS | ubuntu 22.04
Queue | AmpereUbuntu
Baseline | [28c417f605ba0f04af980847695ec9de470743a0](https://github.com/dotnet/runtime/commit/28c417f605ba0f04af980847695ec9de470743a0)
Compare | [659321ff5db13026f52aec70cf2a6692bd4be454](https://github.com/dotnet/runtime/commit/659321ff5db13026f52aec70cf2a6692bd4be454)
Diff | [Diff](https://github.com/dotnet/runtime/compare/28c417f605ba0f04af980847695ec9de470743a0...659321ff5db13026f52aec70cf2a6692bd4be454)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in System.IO.Tests.Perf_StreamWriter

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[WriteString - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 22.04/System.IO.Tests.Perf_StreamWriter.WriteString(writeLength%3a%20100).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Runtime.Extensions/Perf.StreamWriter.cs#L96-#L117>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 452.13 ms | 686.19 ms | 1.52 | 0.01 | False | | |
|<ul><li>[WriteFormat - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 22.04/System.IO.Tests.Perf_StreamWriter.WriteFormat.html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Runtime.Extensions/Perf.StreamWriter.cs#L119-#L124>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 62.58 ns | 76.44 ns | 1.22 | 0.00 | False | | |
|<ul><li>[WritePartialCharArray - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 22.04/System.IO.Tests.Perf_StreamWriter.WritePartialCharArray(writeLength%3a%20100).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Runtime.Extensions/Perf.StreamWriter.cs#L72-#L94>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 454.68 ms | 655.52 ms | 1.44 | 0.03 | False | | |
|<ul><li>[WriteCharArray - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 22.04/System.IO.Tests.Perf_StreamWriter.WriteCharArray(writeLength%3a%20100).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Runtime.Extensions/Perf.StreamWriter.cs#L49-#L70>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 454.41 ms | 640.67 ms | 1.41 | 0.01 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_27_2025/refs/heads/main_arm64_ubuntu%2022.04_Regression/System.IO.Tests.Perf_StreamWriter_001.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_27_2025/refs/heads/main_arm64_ubuntu%2022.04_Regression/System.IO.Tests.Perf_StreamWriter_002.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_27_2025/refs/heads/main_arm64_ubuntu%2022.04_Regression/System.IO.Tests.Perf_StreamWriter_003.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_27_2025/refs/heads/main_arm64_ubuntu%2022.04_Regression/System.IO.Tests.Perf_StreamWriter_004.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_27_2025/refs/heads/main_arm64_ubuntu%2022.04_Regression/System.IO.Tests.Perf_StreamWriter.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.Perf_StreamWriter*'
```

<details>

### System.IO.Tests.Perf_StreamWriter.WriteString(writeLength: 100)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.IO.Tests.Perf_StreamWriter.WriteFormat

#### ETL Files

#### Histogram

#### JIT Disasms

### System.IO.Tests.Perf_StreamWriter.WritePartialCharArray(writeLength: 100)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.IO.Tests.Perf_StreamWriter.WriteCharArray(writeLength: 100)

#### 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 | [28c417f605ba0f04af980847695ec9de470743a0](https://github.com/dotnet/runtime/commit/28c417f605ba0f04af980847695ec9de470743a0)
Compare | [fa4c14e0d82447c25aa0fa4d9735c905e30836ac](https://github.com/dotnet/runtime/commit/fa4c14e0d82447c25aa0fa4d9735c905e30836ac)
Diff | [Diff](https://github.com/dotnet/runtime/compare/28c417f605ba0f04af980847695ec9de470743a0...fa4c14e0d82447c25aa0fa4d9735c905e30836ac)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in MicroBenchmarks.Serializers.Json_ToStream&lt;Location&gt;

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[JsonNet_ - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 22.04/MicroBenchmarks.Serializers.Json_ToStream(Location).JsonNet_.html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/Serializers/Json_ToStream.cs#L51-#L57>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 1.20 μs | 1.33 μs | 1.11 | 0.03 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_27_2025/refs/heads/main_arm64_ubuntu%2022.04_Regression/MicroBenchmarks.Serializers.Json_ToStream%28Location%29_001.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_27_2025/refs/heads/main_arm64_ubuntu%2022.04_Regression/MicroBenchmarks.Serializers.Json_ToStream%28Location%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_ToStream&lt;Location&gt;*'
```

<details>

### MicroBenchmarks.Serializers.Json_ToStream&lt;Location&gt;.JsonNet_

#### 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 | [db03493769728d6b7e02981b432d5136144c4fd0](https://github.com/dotnet/runtime/commit/db03493769728d6b7e02981b432d5136144c4fd0)
Compare | [659321ff5db13026f52aec70cf2a6692bd4be454](https://github.com/dotnet/runtime/commit/659321ff5db13026f52aec70cf2a6692bd4be454)
Diff | [Diff](https://github.com/dotnet/runtime/compare/db03493769728d6b7e02981b432d5136144c4fd0...659321ff5db13026f52aec70cf2a6692bd4be454)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in MicroBenchmarks.Serializers.Json_ToStream&lt;IndexViewModel&gt;

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[JsonNet_ - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 22.04/MicroBenchmarks.Serializers.Json_ToStream(IndexViewModel).JsonNet_.html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/Serializers/Json_ToStream.cs#L51-#L57>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 36.07 μs | 40.11 μs | 1.11 | 0.10 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_27_2025/refs/heads/main_arm64_ubuntu%2022.04_Regression/MicroBenchmarks.Serializers.Json_ToStream%28IndexViewModel%29_001.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_27_2025/refs/heads/main_arm64_ubuntu%2022.04_Regression/MicroBenchmarks.Serializers.Json_ToStream%28IndexViewModel%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_ToStream&lt;IndexViewModel&gt;*'
```

<details>

### MicroBenchmarks.Serializers.Json_ToStream&lt;IndexViewModel&gt;.JsonNet_

#### 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	28c417f605ba0f04af980847695ec9de470743a0
Compare	659321ff5db13026f52aec70cf2a6692bd4be454
Diff	Diff
Configs	CompilationMode:tiered, RunKind:micro

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector
WriteString - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	452.13 ms	686.19 ms	1.52	0.01	False
WriteFormat - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	62.58 ns	76.44 ns	1.22	0.00	False
WritePartialCharArray - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	454.68 ms	655.52 ms	1.44	0.03	False
WriteCharArray - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	454.41 ms	640.67 ms	1.41	0.01	False

[Perf] Linux/arm64: 6 Regressions on 3/24/2025 4:04:18 PM +00:00 #113974

Description

Run Information

Regressions in System.IO.Tests.Perf_StreamWriter

Repro

System.IO.Tests.Perf_StreamWriter.WriteString(writeLength: 100)

ETL Files

Histogram

JIT Disasms

System.IO.Tests.Perf_StreamWriter.WriteFormat

ETL Files

Histogram

JIT Disasms

System.IO.Tests.Perf_StreamWriter.WritePartialCharArray(writeLength: 100)

ETL Files

Histogram

JIT Disasms

System.IO.Tests.Perf_StreamWriter.WriteCharArray(writeLength: 100)

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Regressions in MicroBenchmarks.Serializers.Json_ToStream<Location>

Repro

MicroBenchmarks.Serializers.Json_ToStream<Location>.JsonNet_

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Regressions in MicroBenchmarks.Serializers.Json_ToStream<IndexViewModel>

Repro

MicroBenchmarks.Serializers.Json_ToStream<IndexViewModel>.JsonNet_

ETL Files

Histogram

JIT Disasms

Docs

Metadata

Metadata

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