[Perf] Linux/arm64: 8 Improvements on 10/29/2024 12:20:22 AM

### Run Information

Name | Value
-- | --
Architecture | arm64
OS | ubuntu 22.04
Queue | AmpereUbuntu
Baseline | [f1ad214fb1030ca0e8129473039bb0756bd1e242](https://github.com/dotnet/runtime/commit/f1ad214fb1030ca0e8129473039bb0756bd1e242)
Compare | [97f50455530cfbe21d28544d2b3fb14611f4ae7a](https://github.com/dotnet/runtime/commit/97f50455530cfbe21d28544d2b3fb14611f4ae7a)
Diff | [Diff](https://github.com/dotnet/runtime/compare/f1ad214fb1030ca0e8129473039bb0756bd1e242...97f50455530cfbe21d28544d2b3fb14611f4ae7a)
Configs | CompilationMode:tiered, RunKind:micro


### Improvements in System.Memory.Span&lt;Char&gt;

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[Fill - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 22.04/System.Memory.Span(Char).Fill(Size%3a%2033).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Memory/Span.cs#L43-#L44>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 7.40 ns | 3.63 ns | 0.49 | 0.22 | False | | |
|<ul><li>[Fill - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 22.04/System.Memory.Span(Char).Fill(Size%3a%20512).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Memory/Span.cs#L43-#L44>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 29.65 ns | 23.39 ns | 0.79 | 0.03 | False | | |
|<ul><li>[Fill - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 22.04/System.Memory.Span(Char).Fill(Size%3a%204).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Memory/Span.cs#L43-#L44>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 5.82 ns | 2.37 ns | 0.41 | 0.23 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/11_07_2024/refs/heads/main_arm64_ubuntu%2022.04_Improvement/System.Memory.Span%28Char%29_1.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/11_07_2024/refs/heads/main_arm64_ubuntu%2022.04_Improvement/System.Memory.Span%28Char%29_2.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/11_07_2024/refs/heads/main_arm64_ubuntu%2022.04_Improvement/System.Memory.Span%28Char%29_3.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/11_07_2024/refs/heads/main_arm64_ubuntu%2022.04_Improvement/System.Memory.Span%28Char%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.Memory.Span&lt;Char&gt;*'
```

<details>

### System.Memory.Span&lt;Char&gt;.Fill(Size: 33)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Memory.Span&lt;Char&gt;.Fill(Size: 512)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Memory.Span&lt;Char&gt;.Fill(Size: 4)

#### 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 | [f1ad214fb1030ca0e8129473039bb0756bd1e242](https://github.com/dotnet/runtime/commit/f1ad214fb1030ca0e8129473039bb0756bd1e242)
Compare | [97f50455530cfbe21d28544d2b3fb14611f4ae7a](https://github.com/dotnet/runtime/commit/97f50455530cfbe21d28544d2b3fb14611f4ae7a)
Diff | [Diff](https://github.com/dotnet/runtime/compare/f1ad214fb1030ca0e8129473039bb0756bd1e242...97f50455530cfbe21d28544d2b3fb14611f4ae7a)
Configs | CompilationMode:tiered, RunKind:micro


### Improvements in System.Memory.Span&lt;Byte&gt;

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[Fill - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 22.04/System.Memory.Span(Byte).Fill(Size%3a%20512).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Memory/Span.cs#L43-#L44>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 20.45 ns | 12.93 ns | 0.63 | 0.07 | False | | |
|<ul><li>[Fill - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 22.04/System.Memory.Span(Byte).Fill(Size%3a%204).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Memory/Span.cs#L43-#L44>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 5.78 ns | 2.67 ns | 0.46 | 0.20 | False | | |
|<ul><li>[Fill - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 22.04/System.Memory.Span(Byte).Fill(Size%3a%2033).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Memory/Span.cs#L43-#L44>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 10.56 ns | 2.39 ns | 0.23 | 0.35 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/11_07_2024/refs/heads/main_arm64_ubuntu%2022.04_Improvement/System.Memory.Span%28Byte%29_1.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/11_07_2024/refs/heads/main_arm64_ubuntu%2022.04_Improvement/System.Memory.Span%28Byte%29_2.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/11_07_2024/refs/heads/main_arm64_ubuntu%2022.04_Improvement/System.Memory.Span%28Byte%29_3.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/11_07_2024/refs/heads/main_arm64_ubuntu%2022.04_Improvement/System.Memory.Span%28Byte%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.Memory.Span&lt;Byte&gt;*'
```

<details>

### System.Memory.Span&lt;Byte&gt;.Fill(Size: 512)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Memory.Span&lt;Byte&gt;.Fill(Size: 4)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Memory.Span&lt;Byte&gt;.Fill(Size: 33)

#### 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 | [f1ad214fb1030ca0e8129473039bb0756bd1e242](https://github.com/dotnet/runtime/commit/f1ad214fb1030ca0e8129473039bb0756bd1e242)
Compare | [97f50455530cfbe21d28544d2b3fb14611f4ae7a](https://github.com/dotnet/runtime/commit/97f50455530cfbe21d28544d2b3fb14611f4ae7a)
Diff | [Diff](https://github.com/dotnet/runtime/compare/f1ad214fb1030ca0e8129473039bb0756bd1e242...97f50455530cfbe21d28544d2b3fb14611f4ae7a)
Configs | CompilationMode:tiered, RunKind:micro


### Improvements in System.Tests.Perf_String

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[PadLeft - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 22.04/System.Tests.Perf_String.PadLeft(n%3a%2018).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Runtime/Perf.String.cs#L76-#L80>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 15.37 ns | 12.11 ns | 0.79 | 0.57 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/11_07_2024/refs/heads/main_arm64_ubuntu%2022.04_Improvement/System.Tests.Perf_String_1.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/11_07_2024/refs/heads/main_arm64_ubuntu%2022.04_Improvement/System.Tests.Perf_String.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.Tests.Perf_String*'
```

<details>

### System.Tests.Perf_String.PadLeft(n: 18)

#### 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 | [f1ad214fb1030ca0e8129473039bb0756bd1e242](https://github.com/dotnet/runtime/commit/f1ad214fb1030ca0e8129473039bb0756bd1e242)
Compare | [97f50455530cfbe21d28544d2b3fb14611f4ae7a](https://github.com/dotnet/runtime/commit/97f50455530cfbe21d28544d2b3fb14611f4ae7a)
Diff | [Diff](https://github.com/dotnet/runtime/compare/f1ad214fb1030ca0e8129473039bb0756bd1e242...97f50455530cfbe21d28544d2b3fb14611f4ae7a)
Configs | CompilationMode:tiered, RunKind:micro


### Improvements in System.Collections.Tests.Perf_BitArray

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[BitArraySetAll - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 22.04/System.Collections.Tests.Perf_BitArray.BitArraySetAll(Size%3a%20512).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Collections/Perf.BitArray.cs#L62-#L64>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 18.14 ns | 15.90 ns | 0.88 | 0.06 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/11_07_2024/refs/heads/main_arm64_ubuntu%2022.04_Improvement/System.Collections.Tests.Perf_BitArray_1.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/11_07_2024/refs/heads/main_arm64_ubuntu%2022.04_Improvement/System.Collections.Tests.Perf_BitArray.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.Tests.Perf_BitArray*'
```

<details>

### System.Collections.Tests.Perf_BitArray.BitArraySetAll(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>

Name	Value
Architecture	arm64
OS	ubuntu 22.04
Queue	AmpereUbuntu
Baseline	f1ad214fb1030ca0e8129473039bb0756bd1e242
Compare	97f50455530cfbe21d28544d2b3fb14611f4ae7a
Diff	Diff
Configs	CompilationMode:tiered, RunKind:micro

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector
Fill - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	7.40 ns	3.63 ns	0.49	0.22	False
Fill - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	29.65 ns	23.39 ns	0.79	0.03	False
Fill - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	5.82 ns	2.37 ns	0.41	0.23	False

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector
Fill - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	20.45 ns	12.93 ns	0.63	0.07	False
Fill - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	5.78 ns	2.67 ns	0.46	0.20	False
Fill - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	10.56 ns	2.39 ns	0.23	0.35	False

[Perf] Linux/arm64: 8 Improvements on 10/29/2024 12:20:22 AM #44487

Description

Run Information

Improvements in System.Memory.Span<Char>

Repro

System.Memory.Span<Char>.Fill(Size: 33)

ETL Files

Histogram

JIT Disasms

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

ETL Files

Histogram

JIT Disasms

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

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Improvements in System.Memory.Span<Byte>

Repro

System.Memory.Span<Byte>.Fill(Size: 512)

ETL Files

Histogram

JIT Disasms

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

ETL Files

Histogram

JIT Disasms

System.Memory.Span<Byte>.Fill(Size: 33)

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Improvements in System.Tests.Perf_String

Repro

System.Tests.Perf_String.PadLeft(n: 18)

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Improvements in System.Collections.Tests.Perf_BitArray

Repro

System.Collections.Tests.Perf_BitArray.BitArraySetAll(Size: 512)

ETL Files

Histogram

JIT Disasms

Docs

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