[Perf] Linux/arm64: 15 Improvements on 6/3/2025 8:09:30 PM +00:00

### Run Information

Name | Value
-- | --
Architecture | arm64
OS | ubuntu 22.04
Queue | AmpereUbuntu
Baseline | [fcd197c9a4ea9def2049fdb302eede3e044fba5f](https://github.com/dotnet/runtime/commit/fcd197c9a4ea9def2049fdb302eede3e044fba5f)
Compare | [8091e6036b0d7bb0958e546e17238096108850ec](https://github.com/dotnet/runtime/commit/8091e6036b0d7bb0958e546e17238096108850ec)
Diff | [Diff](https://github.com/dotnet/runtime/compare/fcd197c9a4ea9def2049fdb302eede3e044fba5f...8091e6036b0d7bb0958e546e17238096108850ec)
Configs | CompilationMode:tiered, RunKind:micro


### Improvements in System.Text.Json.Tests.Perf_Reader

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[ReadMultiSpanSequenceEmptyLoop - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 22.04/System.Text.Json.Tests.Perf_Reader.ReadMultiSpanSequenceEmptyLoop(IsDataCompact%3a%20True%2c%20TestCase%3a%20HelloWorld).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Text.Json/Utf8JsonReader/Perf.Reader.cs#L88-#L93>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 142.32 ns | 131.65 ns | 0.93 | 0.00 | False | | |
|<ul><li>[ReadMultiSpanSequenceEmptyLoop - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 22.04/System.Text.Json.Tests.Perf_Reader.ReadMultiSpanSequenceEmptyLoop(IsDataCompact%3a%20False%2c%20TestCase%3a%20HelloWorld).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Text.Json/Utf8JsonReader/Perf.Reader.cs#L88-#L93>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 162.63 ns | 151.95 ns | 0.93 | 0.00 | False | | |
|<ul><li>[ReadSingleSpanSequenceEmptyLoop - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 22.04/System.Text.Json.Tests.Perf_Reader.ReadSingleSpanSequenceEmptyLoop(IsDataCompact%3a%20True%2c%20TestCase%3a%20LotsOfNumbers).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Text.Json/Utf8JsonReader/Perf.Reader.cs#L81-#L86>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 2.11 μs | 1.99 μs | 0.94 | 0.00 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/06_05_2025/refs/heads/main_arm64_ubuntu%2022.04_Improvement/System.Text.Json.Tests.Perf_Reader_001.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/06_05_2025/refs/heads/main_arm64_ubuntu%2022.04_Improvement/System.Text.Json.Tests.Perf_Reader_002.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/06_05_2025/refs/heads/main_arm64_ubuntu%2022.04_Improvement/System.Text.Json.Tests.Perf_Reader_003.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/06_05_2025/refs/heads/main_arm64_ubuntu%2022.04_Improvement/System.Text.Json.Tests.Perf_Reader.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.Perf_Reader*'
```

<details>

### System.Text.Json.Tests.Perf_Reader.ReadMultiSpanSequenceEmptyLoop(IsDataCompact: True, TestCase: HelloWorld)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Text.Json.Tests.Perf_Reader.ReadMultiSpanSequenceEmptyLoop(IsDataCompact: False, TestCase: HelloWorld)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Text.Json.Tests.Perf_Reader.ReadSingleSpanSequenceEmptyLoop(IsDataCompact: True, TestCase: LotsOfNumbers)

#### 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 | [fcd197c9a4ea9def2049fdb302eede3e044fba5f](https://github.com/dotnet/runtime/commit/fcd197c9a4ea9def2049fdb302eede3e044fba5f)
Compare | [8091e6036b0d7bb0958e546e17238096108850ec](https://github.com/dotnet/runtime/commit/8091e6036b0d7bb0958e546e17238096108850ec)
Diff | [Diff](https://github.com/dotnet/runtime/compare/fcd197c9a4ea9def2049fdb302eede3e044fba5f...8091e6036b0d7bb0958e546e17238096108850ec)
Configs | CompilationMode:tiered, RunKind:micro


### Improvements in System.Collections.CtorFromCollection&lt;Int32&gt;

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[ImmutableArray - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 22.04/System.Collections.CtorFromCollection(Int32).ImmutableArray(Size%3a%20512).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Collections/Create/CtorFromCollection.cs#L80-#L81>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 198.81 ns | 182.73 ns | 0.92 | 0.02 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/06_05_2025/refs/heads/main_arm64_ubuntu%2022.04_Improvement/System.Collections.CtorFromCollection%28Int32%29_001.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/06_05_2025/refs/heads/main_arm64_ubuntu%2022.04_Improvement/System.Collections.CtorFromCollection%28Int32%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.CtorFromCollection&lt;Int32&gt;*'
```

<details>

### System.Collections.CtorFromCollection&lt;Int32&gt;.ImmutableArray(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 | [fcd197c9a4ea9def2049fdb302eede3e044fba5f](https://github.com/dotnet/runtime/commit/fcd197c9a4ea9def2049fdb302eede3e044fba5f)
Compare | [8091e6036b0d7bb0958e546e17238096108850ec](https://github.com/dotnet/runtime/commit/8091e6036b0d7bb0958e546e17238096108850ec)
Diff | [Diff](https://github.com/dotnet/runtime/compare/fcd197c9a4ea9def2049fdb302eede3e044fba5f...8091e6036b0d7bb0958e546e17238096108850ec)
Configs | CompilationMode:tiered, RunKind:micro


### Improvements 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%20Skip%2c%20SegmentSize%3a%20100%2c%20TestCase%3a%20LongSingleLine).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> | 662.53 ns | 600.45 ns | 0.91 | 0.00 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/06_05_2025/refs/heads/main_arm64_ubuntu%2022.04_Improvement/System.Text.Json.Tests.Utf8JsonReaderCommentsTests_001.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/06_05_2025/refs/heads/main_arm64_ubuntu%2022.04_Improvement/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: Skip, SegmentSize: 100, TestCase: LongSingleLine)

#### 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 | [fcd197c9a4ea9def2049fdb302eede3e044fba5f](https://github.com/dotnet/runtime/commit/fcd197c9a4ea9def2049fdb302eede3e044fba5f)
Compare | [8091e6036b0d7bb0958e546e17238096108850ec](https://github.com/dotnet/runtime/commit/8091e6036b0d7bb0958e546e17238096108850ec)
Diff | [Diff](https://github.com/dotnet/runtime/compare/fcd197c9a4ea9def2049fdb302eede3e044fba5f...8091e6036b0d7bb0958e546e17238096108850ec)
Configs | CompilationMode:tiered, RunKind:micro


### Improvements in System.Linq.Tests.Perf_Enumerable

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[WhereAny_LastElementMatches - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 22.04/System.Linq.Tests.Perf_Enumerable.WhereAny_LastElementMatches(input%3a%20List).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Linq/Perf.Enumerable.cs#L106-#L108>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=H4sIAAAAAAAACl1STY/TMBC9V+p/GHpxKrJNKCyQIEssSwUSrYS2FXtceZNJY+TYwR6zjVj+O3bSXriM5cnMy/uwQgJCR8DhI9sPjrBbbaX+tTqEplt9R9s8bLTv0IpHhav7Fi3e6OFhKxxtFHaoaSeoatElUveeSthKR0v2YT5TAVo0hDZg14KQZIfJOl9fX+VvrvLrQ16U66J8XazeF6+Kd+u3L/O8zPPledNib8Iiqw1ppMx6HfcvuI9W6KqN3y02LmtR1C7rhNSXgcroRh7jnwctOlklf9it6XqpBEmjd6ZGVgIjGeTULAV25/U3qevYDNPWsL+RyBekr0GOsbIS6rMgcS+pjTjCSme0S6J1PJZ0ksrHmo7seSzpmSqfjvRMjE/Hcj57ht6an1gR7NFKdCl88lLVhyB2T6LrU/ghlEce87g1wQW0d+i8opvfIZMjzmdZ9gxPMZczArwI4BS8cLBYkNmcKuVrXCwgy2BzCpAKwTTQSBWwpD6C8SEocONyJGRR1yG16HfVCkvwFFRDMg3wC81TZZTvNP+f7jD1HR95hzmSpJCzYB8Gp4fzdYfCeTs+ILb8B4BX+fWGAgAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=>)</li></ul> | 107.42 ns | 88.99 ns | 0.83 | 0.44 | False | | |
|<ul><li>[Count - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 22.04/System.Linq.Tests.Perf_Enumerable.Count(input%3a%20ICollection).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Linq/Perf.Enumerable.cs#L344-#L346>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 2.30 ns | 1.24 ns | 0.54 | 0.39 | False | | |
|<ul><li>[WhereLast_LastElementMatches - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 22.04/System.Linq.Tests.Perf_Enumerable.WhereLast_LastElementMatches(input%3a%20List).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Linq/Perf.Enumerable.cs#L66-#L68>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 34.66 ns | 23.64 ns | 0.68 | 0.67 | False | | |
|<ul><li>[LastWithPredicate_FirstElementMatches - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 22.04/System.Linq.Tests.Perf_Enumerable.LastWithPredicate_FirstElementMatches(input%3a%20IList).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Linq/Perf.Enumerable.cs#L95-#L97>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 7.66 ns | 4.44 ns | 0.58 | 0.22 | False | | |
|<ul><li>[CastToBaseClass - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 22.04/System.Linq.Tests.Perf_Enumerable.CastToBaseClass(input%3a%20IEnumerable).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Linq/Perf.Enumerable.cs#L157-#L159>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 2.92 μs | 1.77 μs | 0.61 | 0.27 | False | | |
|<ul><li>[WhereFirst_LastElementMatches - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 22.04/System.Linq.Tests.Perf_Enumerable.WhereFirst_LastElementMatches(input%3a%20IEnumerable).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Linq/Perf.Enumerable.cs#L60-#L62>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 237.66 ns | 222.29 ns | 0.94 | 0.11 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/06_05_2025/refs/heads/main_arm64_ubuntu%2022.04_Improvement/System.Linq.Tests.Perf_Enumerable_001.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/06_05_2025/refs/heads/main_arm64_ubuntu%2022.04_Improvement/System.Linq.Tests.Perf_Enumerable_002.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/06_05_2025/refs/heads/main_arm64_ubuntu%2022.04_Improvement/System.Linq.Tests.Perf_Enumerable_003.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/06_05_2025/refs/heads/main_arm64_ubuntu%2022.04_Improvement/System.Linq.Tests.Perf_Enumerable_004.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/06_05_2025/refs/heads/main_arm64_ubuntu%2022.04_Improvement/System.Linq.Tests.Perf_Enumerable_005.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/06_05_2025/refs/heads/main_arm64_ubuntu%2022.04_Improvement/System.Linq.Tests.Perf_Enumerable_006.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/06_05_2025/refs/heads/main_arm64_ubuntu%2022.04_Improvement/System.Linq.Tests.Perf_Enumerable.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.Linq.Tests.Perf_Enumerable*'
```

<details>

### System.Linq.Tests.Perf_Enumerable.WhereAny_LastElementMatches(input: List)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Linq.Tests.Perf_Enumerable.Count(input: ICollection)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Linq.Tests.Perf_Enumerable.WhereLast_LastElementMatches(input: List)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Linq.Tests.Perf_Enumerable.LastWithPredicate_FirstElementMatches(input: IList)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Linq.Tests.Perf_Enumerable.CastToBaseClass(input: IEnumerable)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Linq.Tests.Perf_Enumerable.WhereFirst_LastElementMatches(input: IEnumerable)

#### 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 | [fcd197c9a4ea9def2049fdb302eede3e044fba5f](https://github.com/dotnet/runtime/commit/fcd197c9a4ea9def2049fdb302eede3e044fba5f)
Compare | [8091e6036b0d7bb0958e546e17238096108850ec](https://github.com/dotnet/runtime/commit/8091e6036b0d7bb0958e546e17238096108850ec)
Diff | [Diff](https://github.com/dotnet/runtime/compare/fcd197c9a4ea9def2049fdb302eede3e044fba5f...8091e6036b0d7bb0958e546e17238096108850ec)
Configs | CompilationMode:tiered, RunKind:micro


### Improvements in System.Tests.Perf_Int32

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[ToString - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 22.04/System.Tests.Perf_Int32.ToString(value%3a%2012345).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Runtime/Perf.Int32.cs#L29-#L31>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 16.26 ns | 13.52 ns | 0.83 | 0.38 | False | | |
|<ul><li>[ToStringHex - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 22.04/System.Tests.Perf_Int32.ToStringHex(value%3a%202147483647).html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Runtime/Perf.Int32.cs#L33-#L36>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 30.46 ns | 23.22 ns | 0.76 | 0.10 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/06_05_2025/refs/heads/main_arm64_ubuntu%2022.04_Improvement/System.Tests.Perf_Int32_001.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/06_05_2025/refs/heads/main_arm64_ubuntu%2022.04_Improvement/System.Tests.Perf_Int32_002.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/06_05_2025/refs/heads/main_arm64_ubuntu%2022.04_Improvement/System.Tests.Perf_Int32.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_Int32*'
```

<details>

### System.Tests.Perf_Int32.ToString(value: 12345)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Tests.Perf_Int32.ToStringHex(value: 2147483647)

#### 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 | [fcd197c9a4ea9def2049fdb302eede3e044fba5f](https://github.com/dotnet/runtime/commit/fcd197c9a4ea9def2049fdb302eede3e044fba5f)
Compare | [8091e6036b0d7bb0958e546e17238096108850ec](https://github.com/dotnet/runtime/commit/8091e6036b0d7bb0958e546e17238096108850ec)
Diff | [Diff](https://github.com/dotnet/runtime/compare/fcd197c9a4ea9def2049fdb302eede3e044fba5f...8091e6036b0d7bb0958e546e17238096108850ec)
Configs | CompilationMode:tiered, RunKind:micro


### Improvements in System.Xml.Linq.Perf_XDocument

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|<ul><li>[GetRootElement - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 22.04/System.Xml.Linq.Perf_XDocument.GetRootElement.html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Xml.Linq/Perf.XDocument.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> | 3.28 ns | 1.74 ns | 0.53 | 0.76 | False | | |
|<ul><li>[CreateWithRootlEement - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 22.04/System.Xml.Linq.Perf_XDocument.CreateWithRootlEement.html>)</li><li>📝 - [Benchmark Source](<https://github.com/dotnet/performance/blob/main/src/benchmarks/micro/libraries/System.Xml.Linq/Perf.XDocument.cs#L31-#L35>)</li><li>[ADX - Test Multi Config Graph](<https://dataexplorer.azure.com/clusters/dotnetperf.westus/databases/PerformanceData?query=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>)</li></ul> | 64.62 ns | 46.08 ns | 0.71 | 0.62 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/06_05_2025/refs/heads/main_arm64_ubuntu%2022.04_Improvement/System.Xml.Linq.Perf_XDocument_001.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/06_05_2025/refs/heads/main_arm64_ubuntu%2022.04_Improvement/System.Xml.Linq.Perf_XDocument_002.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/06_05_2025/refs/heads/main_arm64_ubuntu%2022.04_Improvement/System.Xml.Linq.Perf_XDocument.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_XDocument*'
```

<details>

### System.Xml.Linq.Perf_XDocument.GetRootElement

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Xml.Linq.Perf_XDocument.CreateWithRootlEement

#### 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	fcd197c9a4ea9def2049fdb302eede3e044fba5f
Compare	8091e6036b0d7bb0958e546e17238096108850ec
Diff	Diff
Configs	CompilationMode:tiered, RunKind:micro

Benchmark	Baseline	Test	Test/Base	Edge Detector
ReadMultiSpanSequenceEmptyLoop - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	142.32 ns	131.65 ns	0.93	False
ReadMultiSpanSequenceEmptyLoop - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	162.63 ns	151.95 ns	0.93	False
ReadSingleSpanSequenceEmptyLoop - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	2.11 μs	1.99 μs	0.94	False

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector
WhereAny_LastElementMatches - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	107.42 ns	88.99 ns	0.83	0.44	False
Count - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	2.30 ns	1.24 ns	0.54	0.39	False
WhereLast_LastElementMatches - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	34.66 ns	23.64 ns	0.68	0.67	False
LastWithPredicate_FirstElementMatches - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	7.66 ns	4.44 ns	0.58	0.22	False
CastToBaseClass - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	2.92 μs	1.77 μs	0.61	0.27	False
WhereFirst_LastElementMatches - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	237.66 ns	222.29 ns	0.94	0.11	False

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio
ToString - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	16.26 ns	13.52 ns	0.83	0.38	False
ToStringHex - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	30.46 ns	23.22 ns	0.76	0.10	False

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio
GetRootElement - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	3.28 ns	1.74 ns	0.53	0.76	False
CreateWithRootlEement - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	64.62 ns	46.08 ns	0.71	0.62	False

[Perf] Linux/arm64: 15 Improvements on 6/3/2025 8:09:30 PM +00:00 #56958

Description

Run Information

Improvements in System.Text.Json.Tests.Perf_Reader

Repro

System.Text.Json.Tests.Perf_Reader.ReadMultiSpanSequenceEmptyLoop(IsDataCompact: True, TestCase: HelloWorld)

ETL Files

Histogram

JIT Disasms

System.Text.Json.Tests.Perf_Reader.ReadMultiSpanSequenceEmptyLoop(IsDataCompact: False, TestCase: HelloWorld)

ETL Files

Histogram

JIT Disasms

System.Text.Json.Tests.Perf_Reader.ReadSingleSpanSequenceEmptyLoop(IsDataCompact: True, TestCase: LotsOfNumbers)

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Improvements in System.Collections.CtorFromCollection<Int32>

Repro

System.Collections.CtorFromCollection<Int32>.ImmutableArray(Size: 512)

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Improvements in System.Text.Json.Tests.Utf8JsonReaderCommentsTests

Repro

System.Text.Json.Tests.Utf8JsonReaderCommentsTests.Utf8JsonReaderCommentParsing(CommentHandling: Skip, SegmentSize: 100, TestCase: LongSingleLine)

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Improvements in System.Linq.Tests.Perf_Enumerable

Repro

System.Linq.Tests.Perf_Enumerable.WhereAny_LastElementMatches(input: List)

ETL Files

Histogram

JIT Disasms

System.Linq.Tests.Perf_Enumerable.Count(input: ICollection)

ETL Files

Histogram

JIT Disasms

System.Linq.Tests.Perf_Enumerable.WhereLast_LastElementMatches(input: List)

ETL Files

Histogram

JIT Disasms

System.Linq.Tests.Perf_Enumerable.LastWithPredicate_FirstElementMatches(input: IList)

ETL Files

Histogram

JIT Disasms

System.Linq.Tests.Perf_Enumerable.CastToBaseClass(input: IEnumerable)

ETL Files

Histogram

JIT Disasms

System.Linq.Tests.Perf_Enumerable.WhereFirst_LastElementMatches(input: IEnumerable)

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Improvements in System.Tests.Perf_Int32

Repro

System.Tests.Perf_Int32.ToString(value: 12345)

ETL Files

Histogram

JIT Disasms

System.Tests.Perf_Int32.ToStringHex(value: 2147483647)

ETL Files

Histogram

JIT Disasms

Docs

Run Information

Improvements in System.Xml.Linq.Perf_XDocument

Repro

System.Xml.Linq.Perf_XDocument.GetRootElement

ETL Files

Histogram