[Perf] Linux/arm64: 21 Improvements on 3/15/2023 2:24:48 AM

### Run Information

Name | Value
-- | --
Architecture | arm64
OS | ubuntu 20.04
Queue | AmpereUbuntu
Baseline | [d6b89c66d492c1e0b0a88d797264039c50c4f4b7](https://github.com/dotnet/runtime/commit/d6b89c66d492c1e0b0a88d797264039c50c4f4b7)
Compare | [ccefbf9eb36cb3d8adb36f4b141914c2c6cc489b](https://github.com/dotnet/runtime/commit/ccefbf9eb36cb3d8adb36f4b141914c2c6cc489b)
Diff | [Diff](https://github.com/dotnet/runtime/compare/d6b89c66d492c1e0b0a88d797264039c50c4f4b7...ccefbf9eb36cb3d8adb36f4b141914c2c6cc489b)
Configs | CompilationMode:tiered, RunKind:micro


### Improvements in System.Memory.Slice&lt;String&gt;

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio | Baseline ETL | Compare ETL
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[MemoryStart - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Memory.Slice(String).MemoryStart.html>) | 6.57 ns | 5.54 ns | 0.84 | 0.39 | False | | |
[MemorySpanStartLength - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Memory.Slice(String).MemorySpanStartLength.html>) | 9.10 ns | 7.95 ns | 0.87 | 0.05 | False | | |
[MemoryStartLengthSpan - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Memory.Slice(String).MemoryStartLengthSpan.html>) | 10.07 ns | 8.91 ns | 0.89 | 0.06 | False | | |
[MemoryStartSpan - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Memory.Slice(String).MemoryStartSpan.html>) | 10.16 ns | 9.00 ns | 0.89 | 0.03 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_23_2023/refs/heads/main_arm64_ubuntu%2020.04_Improvement/System.Memory.Slice(String)_1.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_23_2023/refs/heads/main_arm64_ubuntu%2020.04_Improvement/System.Memory.Slice(String)_1.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_23_2023/refs/heads/main_arm64_ubuntu%2020.04_Improvement/System.Memory.Slice(String)_1.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_23_2023/refs/heads/main_arm64_ubuntu%2020.04_Improvement/System.Memory.Slice(String)_1.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_23_2023/refs/heads/main_arm64_ubuntu%2020.04_Improvement/System.Memory.Slice(String).html>)

### Repro
General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-4f46edea-62ff-420c-866e-6d1ac9eb79a86243896fb5b4f78b4/43478b6f-ae43-4f3c-b200-0872a0e7a44c.zip?sv=2021-08-06&se=2023-04-13T16%3A57%3A41Z&sr=c&sp=rl&sig=d46cBMa4uaazvCPeX6tXX6go312fYAKjs9jlYJ%2FrsGU%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-780f8bd8-6de0-41fc-b552-3f7633f554dd095334c8de54a4ca8/60a69f50-c985-445a-b56e-2a31c2b5ed55.zip?sv=2021-08-06&se=2023-04-14T11%3A55%3A52Z&sr=c&sp=rl&sig=qWxDcTJPxAy9sm6EyCOBQ7iqJqHp4TuV%2F%2FJkqyuu%2BNo%3D>)

```cmd
git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Memory.Slice&lt;String&gt;*'
```

<details>

### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-4f46edea-62ff-420c-866e-6d1ac9eb79a86243896fb5b4f78b4/43478b6f-ae43-4f3c-b200-0872a0e7a44c.zip?sv=2021-08-06&se=2023-04-13T16%3A57%3A41Z&sr=c&sp=rl&sig=d46cBMa4uaazvCPeX6tXX6go312fYAKjs9jlYJ%2FrsGU%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-780f8bd8-6de0-41fc-b552-3f7633f554dd095334c8de54a4ca8/60a69f50-c985-445a-b56e-2a31c2b5ed55.zip?sv=2021-08-06&se=2023-04-14T11%3A55%3A52Z&sr=c&sp=rl&sig=qWxDcTJPxAy9sm6EyCOBQ7iqJqHp4TuV%2F%2FJkqyuu%2BNo%3D>)
### Histogram

#### System.Memory.Slice&lt;String&gt;.MemoryStart

```log

```
### Description of detection logic
```IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsImprovementWindowed:Marked as improvement because 5.542685380957198 < 6.239233516308874.
IsChangePoint: Marked as a change because one of 3/14/2023 8:42:09 PM, 3/23/2023 3:52:33 AM falls between 3/14/2023 3:18:57 PM and 3/23/2023 3:52:33 AM.
IsImprovementStdDev: Marked as improvement because 56.69297363978086 (T) = (0 -5.568237396257744) / Math.Sqrt((0.04548799373846811 / (299)) + (0.002173535549035416 / (27))) is greater than 1.9673127716992511 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (27) - 2, .975) and 0.13441796762284441 = (6.432940135050683 - 5.568237396257744) / 6.432940135050683 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```#### System.Memory.Slice&lt;String&gt;.MemorySpanStartLength

```log

```
### Description of detection logic
```IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsImprovementWindowed:Marked as improvement because 7.948718814716661 < 8.637093573336292.
IsChangePoint: Marked as a change because one of 1/3/2023 12:19:11 AM, 3/14/2023 8:42:09 PM, 3/23/2023 3:52:33 AM falls between 3/14/2023 3:18:57 PM and 3/23/2023 3:52:33 AM.
IsImprovementStdDev: Marked as improvement because 65.68381820911317 (T) = (0 -7.980311195764312) / Math.Sqrt((0.08174228037936092 / (299)) + (0.001222172523796571 / (27))) is greater than 1.9673127716992511 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (27) - 2, .975) and 0.12810357268595762 = (9.152820158179107 - 7.980311195764312) / 9.152820158179107 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```#### System.Memory.Slice&lt;String&gt;.MemoryStartLengthSpan

```log

```
### Description of detection logic
```IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsImprovementWindowed:Marked as improvement because 8.912992939704663 < 9.566692905735977.
IsChangePoint: Marked as a change because one of 3/14/2023 8:42:09 PM, 3/23/2023 3:52:33 AM falls between 3/14/2023 3:18:57 PM and 3/23/2023 3:52:33 AM.
IsImprovementStdDev: Marked as improvement because 62.98475800448257 (T) = (0 -8.968347940920093) / Math.Sqrt((0.04490849367271554 / (299)) + (0.0015521675839593836 / (27))) is greater than 1.9673127716992511 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (27) - 2, .975) and 0.09190806886067197 = (9.876035270644955 - 8.968347940920093) / 9.876035270644955 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```#### System.Memory.Slice&lt;String&gt;.MemoryStartSpan

```log

```
### Description of detection logic
```IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsImprovementWindowed:Marked as improvement because 8.996592698139478 < 9.648339492045135.
IsChangePoint: Marked as a change because one of 3/14/2023 8:42:09 PM, 3/23/2023 3:52:33 AM falls between 3/14/2023 3:18:57 PM and 3/23/2023 3:52:33 AM.
IsImprovementStdDev: Marked as improvement because 56.581261804561215 (T) = (0 -8.977127773388359) / Math.Sqrt((0.04778613622280085 / (299)) + (0.003086127569616385 / (27))) is greater than 1.9673127716992511 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (27) - 2, .975) and 0.09449269477149075 = (9.913920872369921 - 8.977127773388359) / 9.913920872369921 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```

### 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 20.04
Queue | AmpereUbuntu
Baseline | [d6b89c66d492c1e0b0a88d797264039c50c4f4b7](https://github.com/dotnet/runtime/commit/d6b89c66d492c1e0b0a88d797264039c50c4f4b7)
Compare | [ccefbf9eb36cb3d8adb36f4b141914c2c6cc489b](https://github.com/dotnet/runtime/commit/ccefbf9eb36cb3d8adb36f4b141914c2c6cc489b)
Diff | [Diff](https://github.com/dotnet/runtime/compare/d6b89c66d492c1e0b0a88d797264039c50c4f4b7...ccefbf9eb36cb3d8adb36f4b141914c2c6cc489b)
Configs | CompilationMode:tiered, RunKind:micro


### Improvements in System.Memory.Constructors&lt;String&gt;

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio | Baseline ETL | Compare ETL
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[MemoryFromArray - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Memory.Constructors(String).MemoryFromArray.html>) | 17.47 ns | 5.94 ns | 0.34 | 0.49 | False | | |
[ArrayAsSpanStartLength - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Memory.Constructors(String).ArrayAsSpanStartLength.html>) | 12.90 ns | 8.87 ns | 0.69 | 0.11 | False | | |
[ArrayAsSpan - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Memory.Constructors(String).ArrayAsSpan.html>) | 11.90 ns | 7.36 ns | 0.62 | 0.14 | False | | |
[ArrayAsMemory - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Memory.Constructors(String).ArrayAsMemory.html>) | 19.49 ns | 7.89 ns | 0.40 | 0.50 | False | | |
[ReadOnlySpanImplicitCastFromArraySegment - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Memory.Constructors(String).ReadOnlySpanImplicitCastFromArraySegment.html>) | 5.84 ns | 3.62 ns | 0.62 | 0.28 | False | | |
[SpanFromArrayStartLength - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Memory.Constructors(String).SpanFromArrayStartLength.html>) | 10.93 ns | 5.90 ns | 0.54 | 0.06 | False | | |
[SpanImplicitCastFromArray - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Memory.Constructors(String).SpanImplicitCastFromArray.html>) | 10.68 ns | 4.35 ns | 0.41 | 0.37 | False | | |
[SpanFromArray - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Memory.Constructors(String).SpanFromArray.html>) | 10.47 ns | 5.36 ns | 0.51 | 0.10 | False | | |
[ArrayAsMemoryStartLength - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Memory.Constructors(String).ArrayAsMemoryStartLength.html>) | 21.57 ns | 9.43 ns | 0.44 | 0.60 | False | | |
[MemoryFromArrayStartLength - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Memory.Constructors(String).MemoryFromArrayStartLength.html>) | 11.54 ns | 6.40 ns | 0.55 | 0.47 | False | | |
[SpanImplicitCastFromArraySegment - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Memory.Constructors(String).SpanImplicitCastFromArraySegment.html>) | 12.64 ns | 8.62 ns | 0.68 | 0.33 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_23_2023/refs/heads/main_arm64_ubuntu%2020.04_Improvement/System.Memory.Constructors(String)_1.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_23_2023/refs/heads/main_arm64_ubuntu%2020.04_Improvement/System.Memory.Constructors(String)_1.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_23_2023/refs/heads/main_arm64_ubuntu%2020.04_Improvement/System.Memory.Constructors(String)_1.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_23_2023/refs/heads/main_arm64_ubuntu%2020.04_Improvement/System.Memory.Constructors(String)_1.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_23_2023/refs/heads/main_arm64_ubuntu%2020.04_Improvement/System.Memory.Constructors(String)_1.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_23_2023/refs/heads/main_arm64_ubuntu%2020.04_Improvement/System.Memory.Constructors(String)_1.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_23_2023/refs/heads/main_arm64_ubuntu%2020.04_Improvement/System.Memory.Constructors(String)_1.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_23_2023/refs/heads/main_arm64_ubuntu%2020.04_Improvement/System.Memory.Constructors(String)_1.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_23_2023/refs/heads/main_arm64_ubuntu%2020.04_Improvement/System.Memory.Constructors(String)_1.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_23_2023/refs/heads/main_arm64_ubuntu%2020.04_Improvement/System.Memory.Constructors(String)_1.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_23_2023/refs/heads/main_arm64_ubuntu%2020.04_Improvement/System.Memory.Constructors(String)_1.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_23_2023/refs/heads/main_arm64_ubuntu%2020.04_Improvement/System.Memory.Constructors(String).html>)

### Repro
General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-4f46edea-62ff-420c-866e-6d1ac9eb79a86243896fb5b4f78b4/43478b6f-ae43-4f3c-b200-0872a0e7a44c.zip?sv=2021-08-06&se=2023-04-13T16%3A57%3A41Z&sr=c&sp=rl&sig=d46cBMa4uaazvCPeX6tXX6go312fYAKjs9jlYJ%2FrsGU%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-780f8bd8-6de0-41fc-b552-3f7633f554dd095334c8de54a4ca8/60a69f50-c985-445a-b56e-2a31c2b5ed55.zip?sv=2021-08-06&se=2023-04-14T11%3A55%3A52Z&sr=c&sp=rl&sig=qWxDcTJPxAy9sm6EyCOBQ7iqJqHp4TuV%2F%2FJkqyuu%2BNo%3D>)

```cmd
git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Memory.Constructors&lt;String&gt;*'
```

<details>

### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-4f46edea-62ff-420c-866e-6d1ac9eb79a86243896fb5b4f78b4/43478b6f-ae43-4f3c-b200-0872a0e7a44c.zip?sv=2021-08-06&se=2023-04-13T16%3A57%3A41Z&sr=c&sp=rl&sig=d46cBMa4uaazvCPeX6tXX6go312fYAKjs9jlYJ%2FrsGU%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-780f8bd8-6de0-41fc-b552-3f7633f554dd095334c8de54a4ca8/60a69f50-c985-445a-b56e-2a31c2b5ed55.zip?sv=2021-08-06&se=2023-04-14T11%3A55%3A52Z&sr=c&sp=rl&sig=qWxDcTJPxAy9sm6EyCOBQ7iqJqHp4TuV%2F%2FJkqyuu%2BNo%3D>)
### Histogram

#### System.Memory.Constructors&lt;String&gt;.MemoryFromArray

```log

```
### Description of detection logic
```IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsImprovementWindowed:Marked as improvement because 5.9367851924651225 < 10.894822586331953.
IsChangePoint: Marked as a change because one of 3/14/2023 8:42:09 PM, 3/23/2023 3:52:33 AM falls between 3/14/2023 3:18:57 PM and 3/23/2023 3:52:33 AM.
IsImprovementStdDev: Marked as improvement because 44.36202807229378 (T) = (0 -5.788512800744097) / Math.Sqrt((6.875933520951257 / (299)) + (0.2058326261737212 / (27))) is greater than 1.9673127716992511 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (27) - 2, .975) and 0.5728418385827513 = (13.551216677070274 - 5.788512800744097) / 13.551216677070274 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```#### System.Memory.Constructors&lt;String&gt;.ArrayAsSpanStartLength

```log

```
### Description of detection logic
```IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsImprovementWindowed:Marked as improvement because 8.874374880911054 < 12.518559055624685.
IsChangePoint: Marked as a change because one of 3/14/2023 8:42:09 PM, 3/23/2023 3:52:33 AM falls between 3/14/2023 3:18:57 PM and 3/23/2023 3:52:33 AM.
IsImprovementStdDev: Marked as improvement because 47.80064246844988 (T) = (0 -8.773805793832125) / Math.Sqrt((0.29597100415659505 / (299)) + (0.1896215609073531 / (27))) is greater than 1.9673127716992511 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (27) - 2, .975) and 0.32781515808123357 = (13.052668323771037 - 8.773805793832125) / 13.052668323771037 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```#### System.Memory.Constructors&lt;String&gt;.ArrayAsSpan

```log

```
### Description of detection logic
```IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsImprovementWindowed:Marked as improvement because 7.357112241959345 < 11.301419553016101.
IsChangePoint: Marked as a change because one of 3/14/2023 8:42:09 PM, 3/23/2023 3:52:33 AM falls between 3/14/2023 3:18:57 PM and 3/23/2023 3:52:33 AM.
IsImprovementStdDev: Marked as improvement because 40.993571924254596 (T) = (0 -7.015643696488594) / Math.Sqrt((0.526464622853423 / (299)) + (0.3360780746686875 / (27))) is greater than 1.9673127716992511 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (27) - 2, .975) and 0.4105483071606047 = (11.90198243844913 - 7.015643696488594) / 11.90198243844913 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```#### System.Memory.Constructors&lt;String&gt;.ArrayAsMemory

```log

```
### Description of detection logic
```IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsImprovementWindowed:Marked as improvement because 7.891438634967937 < 18.05541419783384.
IsChangePoint: Marked as a change because one of 3/14/2023 8:42:09 PM, 3/23/2023 3:52:33 AM falls between 3/14/2023 3:18:57 PM and 3/23/2023 3:52:33 AM.
IsImprovementStdDev: Marked as improvement because 40.026544253921315 (T) = (0 -7.774530529655214) / Math.Sqrt((10.571644313637634 / (299)) + (0.12318961616087588 / (27))) is greater than 1.9673127716992511 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (27) - 2, .975) and 0.5070598901465228 = (15.771754771520085 - 7.774530529655214) / 15.771754771520085 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```#### System.Memory.Constructors&lt;String&gt;.ReadOnlySpanImplicitCastFromArraySegment

```log

```
### Description of detection logic
```IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsImprovementWindowed:Marked as improvement because 3.6187120848345264 < 5.598369359788326.
IsChangePoint: Marked as a change because one of 3/14/2023 8:42:09 PM, 3/23/2023 3:52:33 AM falls between 3/14/2023 3:18:57 PM and 3/23/2023 3:52:33 AM.
IsImprovementStdDev: Marked as improvement because 28.127474894419954 (T) = (0 -3.435456232422081) / Math.Sqrt((0.22667956791342397 / (299)) + (0.16348753873855137 / (27))) is greater than 1.9673127716992511 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (27) - 2, .975) and 0.4032724815145329 = (5.757160724113227 - 3.435456232422081) / 5.757160724113227 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```#### System.Memory.Constructors&lt;String&gt;.SpanFromArrayStartLength

```log

```
### Description of detection logic
```IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsImprovementWindowed:Marked as improvement because 5.895945363748398 < 10.381284990970128.
IsChangePoint: Marked as a change because one of 3/14/2023 8:42:09 PM, 3/23/2023 3:52:33 AM falls between 3/14/2023 3:18:57 PM and 3/23/2023 3:52:33 AM.
IsImprovementStdDev: Marked as improvement because 60.286190768301296 (T) = (0 -5.8620333800405255) / Math.Sqrt((0.08259909758011669 / (299)) + (0.18742541186240153 / (27))) is greater than 1.9673127716992511 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (27) - 2, .975) and 0.466304452142022 = (10.98385287935824 - 5.8620333800405255) / 10.98385287935824 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```#### System.Memory.Constructors&lt;String&gt;.SpanImplicitCastFromArray

```log

```
### Description of detection logic
```IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsImprovementWindowed:Marked as improvement because 4.352033161763314 < 9.121305564427251.
IsChangePoint: Marked as a change because one of 3/14/2023 8:42:09 PM, 3/23/2023 3:52:33 AM falls between 3/14/2023 3:18:57 PM and 3/23/2023 3:52:33 AM.
IsImprovementStdDev: Marked as improvement because 77.69777489934955 (T) = (0 -4.079099686189488) / Math.Sqrt((0.5052247366957507 / (299)) + (0.12288346496744894 / (27))) is greater than 1.9673127716992511 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (27) - 2, .975) and 0.6007615472993924 = (10.217201420847205 - 4.079099686189488) / 10.217201420847205 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```#### System.Memory.Constructors&lt;String&gt;.SpanFromArray

```log

```
### Description of detection logic
```IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsImprovementWindowed:Marked as improvement because 5.357606850448174 < 9.935369569952803.
IsChangePoint: Marked as a change because one of 3/14/2023 8:42:09 PM, 3/23/2023 3:52:33 AM falls between 3/14/2023 3:18:57 PM and 3/23/2023 3:52:33 AM.
IsImprovementStdDev: Marked as improvement because 111.21261891234275 (T) = (0 -5.395522131764265) / Math.Sqrt((0.5368287919966773 / (299)) + (0.00485244611521595 / (27))) is greater than 1.9673127716992511 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (27) - 2, .975) and 0.4780927908899705 = (10.338086996278241 - 5.395522131764265) / 10.338086996278241 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```#### System.Memory.Constructors&lt;String&gt;.ArrayAsMemoryStartLength

```log

```
### Description of detection logic
```IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsImprovementWindowed:Marked as improvement because 9.42856898927447 < 16.13905880388536.
IsChangePoint: Marked as a change because one of 3/14/2023 8:42:09 PM, 3/23/2023 3:52:33 AM falls between 3/14/2023 3:18:57 PM and 3/23/2023 3:52:33 AM.
IsImprovementStdDev: Marked as improvement because 32.064664733465335 (T) = (0 -9.591271116242444) / Math.Sqrt((12.293612909326324 / (299)) + (0.33603189785745713 / (27))) is greater than 1.9673127716992511 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (27) - 2, .975) and 0.4362089800092831 = (17.012103379015098 - 9.591271116242444) / 17.012103379015098 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```#### System.Memory.Constructors&lt;String&gt;.MemoryFromArrayStartLength

```log

```
### Description of detection logic
```IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsImprovementWindowed:Marked as improvement because 6.3962379471383874 < 10.949983932383914.
IsChangePoint: Marked as a change because one of 3/14/2023 8:42:09 PM, 3/23/2023 3:52:33 AM falls between 3/14/2023 3:18:57 PM and 3/23/2023 3:52:33 AM.
IsImprovementStdDev: Marked as improvement because 47.3536435247484 (T) = (0 -6.279455944048552) / Math.Sqrt((5.533120925177773 / (299)) + (0.1467453376857559 / (27))) is greater than 1.9673127716992511 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (27) - 2, .975) and 0.53849049341919 = (13.606341482694948 - 6.279455944048552) / 13.606341482694948 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```#### System.Memory.Constructors&lt;String&gt;.SpanImplicitCastFromArraySegment

```log

```
### Description of detection logic
```IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsImprovementWindowed:Marked as improvement because 8.618297804823012 < 11.980566622870487.
IsChangePoint: Marked as a change because one of 3/14/2023 8:42:09 PM, 3/23/2023 3:52:33 AM falls between 3/14/2023 3:18:57 PM and 3/23/2023 3:52:33 AM.
IsImprovementStdDev: Marked as improvement because 26.03282821053587 (T) = (0 -7.580214831920342) / Math.Sqrt((0.7411232241052731 / (299)) + (0.9636164646703438 / (27))) is greater than 1.9673127716992511 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (27) - 2, .975) and 0.4015382461780397 = (12.66616418427872 - 7.580214831920342) / 12.66616418427872 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```

### 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 20.04
Queue | AmpereUbuntu
Baseline | [d6b89c66d492c1e0b0a88d797264039c50c4f4b7](https://github.com/dotnet/runtime/commit/d6b89c66d492c1e0b0a88d797264039c50c4f4b7)
Compare | [ccefbf9eb36cb3d8adb36f4b141914c2c6cc489b](https://github.com/dotnet/runtime/commit/ccefbf9eb36cb3d8adb36f4b141914c2c6cc489b)
Diff | [Diff](https://github.com/dotnet/runtime/compare/d6b89c66d492c1e0b0a88d797264039c50c4f4b7...ccefbf9eb36cb3d8adb36f4b141914c2c6cc489b)
Configs | CompilationMode:tiered, RunKind:micro


### Improvements in System.Collections.IterateForEach&lt;String&gt;

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio | Baseline ETL | Compare ETL
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[Queue - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Collections.IterateForEach(String).Queue(Size%3a%20512).html>) | 4.12 μs | 3.50 μs | 0.85 | 0.40 | False | | |
[Stack - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Collections.IterateForEach(String).Stack(Size%3a%20512).html>) | 3.96 μs | 3.44 μs | 0.87 | 0.52 | False | | |
[ImmutableQueue - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Collections.IterateForEach(String).ImmutableQueue(Size%3a%20512).html>) | 4.64 μs | 4.28 μs | 0.92 | 0.38 | False | | |
[Span - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Collections.IterateForEach(String).Span(Size%3a%20512).html>) | 235.05 ns | 186.17 ns | 0.79 | 0.04 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_23_2023/refs/heads/main_arm64_ubuntu%2020.04_Improvement/System.Collections.IterateForEach(String)_1.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_23_2023/refs/heads/main_arm64_ubuntu%2020.04_Improvement/System.Collections.IterateForEach(String)_1.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_23_2023/refs/heads/main_arm64_ubuntu%2020.04_Improvement/System.Collections.IterateForEach(String)_1.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_23_2023/refs/heads/main_arm64_ubuntu%2020.04_Improvement/System.Collections.IterateForEach(String)_1.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_23_2023/refs/heads/main_arm64_ubuntu%2020.04_Improvement/System.Collections.IterateForEach(String).html>)

### Repro
General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-4f46edea-62ff-420c-866e-6d1ac9eb79a86243896fb5b4f78b4/43478b6f-ae43-4f3c-b200-0872a0e7a44c.zip?sv=2021-08-06&se=2023-04-13T16%3A57%3A41Z&sr=c&sp=rl&sig=d46cBMa4uaazvCPeX6tXX6go312fYAKjs9jlYJ%2FrsGU%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-780f8bd8-6de0-41fc-b552-3f7633f554dd095334c8de54a4ca8/60a69f50-c985-445a-b56e-2a31c2b5ed55.zip?sv=2021-08-06&se=2023-04-14T11%3A55%3A52Z&sr=c&sp=rl&sig=qWxDcTJPxAy9sm6EyCOBQ7iqJqHp4TuV%2F%2FJkqyuu%2BNo%3D>)

```cmd
git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Collections.IterateForEach&lt;String&gt;*'
```

<details>

### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-4f46edea-62ff-420c-866e-6d1ac9eb79a86243896fb5b4f78b4/43478b6f-ae43-4f3c-b200-0872a0e7a44c.zip?sv=2021-08-06&se=2023-04-13T16%3A57%3A41Z&sr=c&sp=rl&sig=d46cBMa4uaazvCPeX6tXX6go312fYAKjs9jlYJ%2FrsGU%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-780f8bd8-6de0-41fc-b552-3f7633f554dd095334c8de54a4ca8/60a69f50-c985-445a-b56e-2a31c2b5ed55.zip?sv=2021-08-06&se=2023-04-14T11%3A55%3A52Z&sr=c&sp=rl&sig=qWxDcTJPxAy9sm6EyCOBQ7iqJqHp4TuV%2F%2FJkqyuu%2BNo%3D>)
### Histogram

#### System.Collections.IterateForEach&lt;String&gt;.Queue(Size: 512)

```log

```
### Description of detection logic
```IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsImprovementWindowed:Marked as improvement because 3.4970190294601466 < 3.9179774694203195.
IsChangePoint: Marked as a change because one of 3/14/2023 8:42:09 PM, 3/23/2023 3:52:33 AM falls between 3/14/2023 3:18:57 PM and 3/23/2023 3:52:33 AM.
IsImprovementStdDev: Marked as improvement because 41.1930779784716 (T) = (0 -3524.3859433967905) / Math.Sqrt((20214.664065435587 / (299)) + (1565.6327017798044 / (27))) is greater than 1.9673127716992511 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (27) - 2, .975) and 0.11581582683284014 = (3986.0314743843373 - 3524.3859433967905) / 3986.0314743843373 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```#### System.Collections.IterateForEach&lt;String&gt;.Stack(Size: 512)

```log

```
### Description of detection logic
```IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsImprovementWindowed:Marked as improvement because 3.4412925347222223 < 3.4665088725182356.
IsChangePoint: Marked as a change because one of 3/14/2023 8:42:09 PM, 3/23/2023 3:52:33 AM falls between 3/14/2023 3:18:57 PM and 3/23/2023 3:52:33 AM.
IsImprovementStdDev: Marked as improvement because 21.078807726714942 (T) = (0 -3330.299298002291) / Math.Sqrt((49039.491297190885 / (299)) + (12653.820186013547 / (27))) is greater than 1.9673127716992511 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (27) - 2, .975) and 0.13733852498281635 = (3860.493825733847 - 3330.299298002291) / 3860.493825733847 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```#### System.Collections.IterateForEach&lt;String&gt;.ImmutableQueue(Size: 512)

```log

```
### Description of detection logic
```IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsImprovementWindowed:Marked as improvement because 4.280580981588085 < 4.3646310184978105.
IsChangePoint: Marked as a change because one of 3/14/2023 8:42:09 PM, 3/23/2023 3:52:33 AM falls between 3/14/2023 3:18:57 PM and 3/23/2023 3:52:33 AM.
IsImprovementStdDev: Marked as improvement because 30.120420427799687 (T) = (0 -4302.832333924725) / Math.Sqrt((94985.82068354459 / (299)) + (284.2914134858172 / (27))) is greater than 1.9673127716992511 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (27) - 2, .975) and 0.11254524962081457 = (4848.508988301929 - 4302.832333924725) / 4848.508988301929 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```#### System.Collections.IterateForEach&lt;String&gt;.Span(Size: 512)

```log

```
### Description of detection logic
```IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsImprovementWindowed:Marked as improvement because 186.16803542401814 < 216.65627849615697.
IsChangePoint: Marked as a change because one of 3/14/2023 8:42:09 PM, 3/23/2023 3:52:33 AM falls between 3/14/2023 3:18:57 PM and 3/23/2023 3:52:33 AM.
IsImprovementStdDev: Marked as improvement because 31.873358376388936 (T) = (0 -193.75492511435218) / Math.Sqrt((8.047888437372881 / (299)) + (37.29102250122294 / (27))) is greater than 1.9673127716992511 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (27) - 2, .975) and 0.16332202715467686 = (231.57646239381958 - 193.75492511435218) / 231.57646239381958 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```

### 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 20.04
Queue | AmpereUbuntu
Baseline | [d6b89c66d492c1e0b0a88d797264039c50c4f4b7](https://github.com/dotnet/runtime/commit/d6b89c66d492c1e0b0a88d797264039c50c4f4b7)
Compare | [ccefbf9eb36cb3d8adb36f4b141914c2c6cc489b](https://github.com/dotnet/runtime/commit/ccefbf9eb36cb3d8adb36f4b141914c2c6cc489b)
Diff | [Diff](https://github.com/dotnet/runtime/compare/d6b89c66d492c1e0b0a88d797264039c50c4f4b7...ccefbf9eb36cb3d8adb36f4b141914c2c6cc489b)
Configs | CompilationMode:tiered, RunKind:micro


### Improvements in System.Collections.Concurrent.Count&lt;String&gt;

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio | Baseline ETL | Compare ETL
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[Queue - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Collections.Concurrent.Count(String).Queue(Size%3a%20512).html>) | 14.78 ns | 12.63 ns | 0.85 | 0.02 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_23_2023/refs/heads/main_arm64_ubuntu%2020.04_Improvement/System.Collections.Concurrent.Count(String)_1.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_23_2023/refs/heads/main_arm64_ubuntu%2020.04_Improvement/System.Collections.Concurrent.Count(String).html>)

### Repro
General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-4f46edea-62ff-420c-866e-6d1ac9eb79a86243896fb5b4f78b4/43478b6f-ae43-4f3c-b200-0872a0e7a44c.zip?sv=2021-08-06&se=2023-04-13T16%3A57%3A41Z&sr=c&sp=rl&sig=d46cBMa4uaazvCPeX6tXX6go312fYAKjs9jlYJ%2FrsGU%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-780f8bd8-6de0-41fc-b552-3f7633f554dd095334c8de54a4ca8/60a69f50-c985-445a-b56e-2a31c2b5ed55.zip?sv=2021-08-06&se=2023-04-14T11%3A55%3A52Z&sr=c&sp=rl&sig=qWxDcTJPxAy9sm6EyCOBQ7iqJqHp4TuV%2F%2FJkqyuu%2BNo%3D>)

```cmd
git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Collections.Concurrent.Count&lt;String&gt;*'
```

<details>

### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-4f46edea-62ff-420c-866e-6d1ac9eb79a86243896fb5b4f78b4/43478b6f-ae43-4f3c-b200-0872a0e7a44c.zip?sv=2021-08-06&se=2023-04-13T16%3A57%3A41Z&sr=c&sp=rl&sig=d46cBMa4uaazvCPeX6tXX6go312fYAKjs9jlYJ%2FrsGU%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-780f8bd8-6de0-41fc-b552-3f7633f554dd095334c8de54a4ca8/60a69f50-c985-445a-b56e-2a31c2b5ed55.zip?sv=2021-08-06&se=2023-04-14T11%3A55%3A52Z&sr=c&sp=rl&sig=qWxDcTJPxAy9sm6EyCOBQ7iqJqHp4TuV%2F%2FJkqyuu%2BNo%3D>)
### Histogram

#### System.Collections.Concurrent.Count&lt;String&gt;.Queue(Size: 512)

```log

```
### Description of detection logic
```IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsImprovementWindowed:Marked as improvement because 12.625527890382672 < 13.954002513800356.
IsChangePoint: Marked as a change because one of 1/11/2023 5:39:19 AM, 3/14/2023 8:42:09 PM, 3/23/2023 3:52:33 AM falls between 3/14/2023 3:18:57 PM and 3/23/2023 3:52:33 AM.
IsImprovementStdDev: Marked as improvement because 45.653959096374805 (T) = (0 -12.38272929171801) / Math.Sqrt((0.9548389438912407 / (299)) + (0.01867790335941646 / (27))) is greater than 1.9673127716992511 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (27) - 2, .975) and 0.18686650859669474 = (15.228408893043998 - 12.38272929171801) / 15.228408893043998 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```

### 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 20.04
Queue | AmpereUbuntu
Baseline | [d6b89c66d492c1e0b0a88d797264039c50c4f4b7](https://github.com/dotnet/runtime/commit/d6b89c66d492c1e0b0a88d797264039c50c4f4b7)
Compare | [ccefbf9eb36cb3d8adb36f4b141914c2c6cc489b](https://github.com/dotnet/runtime/commit/ccefbf9eb36cb3d8adb36f4b141914c2c6cc489b)
Diff | [Diff](https://github.com/dotnet/runtime/compare/d6b89c66d492c1e0b0a88d797264039c50c4f4b7...ccefbf9eb36cb3d8adb36f4b141914c2c6cc489b)
Configs | CompilationMode:tiered, RunKind:micro


### Improvements in System.Collections.ContainsKeyTrue&lt;String, String&gt;

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio | Baseline ETL | Compare ETL
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[IDictionary - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Collections.ContainsKeyTrue(String%2c%20String).IDictionary(Size%3a%20512).html>) | 17.68 μs | 15.67 μs | 0.89 | 0.10 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_23_2023/refs/heads/main_arm64_ubuntu%2020.04_Improvement/System.Collections.ContainsKeyTrue(String,%20String)_1.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_23_2023/refs/heads/main_arm64_ubuntu%2020.04_Improvement/System.Collections.ContainsKeyTrue(String,%20String).html>)

### Repro
General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-4f46edea-62ff-420c-866e-6d1ac9eb79a86243896fb5b4f78b4/43478b6f-ae43-4f3c-b200-0872a0e7a44c.zip?sv=2021-08-06&se=2023-04-13T16%3A57%3A41Z&sr=c&sp=rl&sig=d46cBMa4uaazvCPeX6tXX6go312fYAKjs9jlYJ%2FrsGU%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-780f8bd8-6de0-41fc-b552-3f7633f554dd095334c8de54a4ca8/60a69f50-c985-445a-b56e-2a31c2b5ed55.zip?sv=2021-08-06&se=2023-04-14T11%3A55%3A52Z&sr=c&sp=rl&sig=qWxDcTJPxAy9sm6EyCOBQ7iqJqHp4TuV%2F%2FJkqyuu%2BNo%3D>)

```cmd
git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Collections.ContainsKeyTrue&lt;String, String&gt;*'
```

<details>

### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-4f46edea-62ff-420c-866e-6d1ac9eb79a86243896fb5b4f78b4/43478b6f-ae43-4f3c-b200-0872a0e7a44c.zip?sv=2021-08-06&se=2023-04-13T16%3A57%3A41Z&sr=c&sp=rl&sig=d46cBMa4uaazvCPeX6tXX6go312fYAKjs9jlYJ%2FrsGU%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-780f8bd8-6de0-41fc-b552-3f7633f554dd095334c8de54a4ca8/60a69f50-c985-445a-b56e-2a31c2b5ed55.zip?sv=2021-08-06&se=2023-04-14T11%3A55%3A52Z&sr=c&sp=rl&sig=qWxDcTJPxAy9sm6EyCOBQ7iqJqHp4TuV%2F%2FJkqyuu%2BNo%3D>)
### Histogram

#### System.Collections.ContainsKeyTrue&lt;String, String&gt;.IDictionary(Size: 512)

```log

```
### Description of detection logic
```IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsImprovementWindowed:Marked as improvement because 15.665005862211219 < 16.783413714535456.
IsChangePoint: Marked as a change because one of 3/14/2023 8:42:09 PM, 3/23/2023 3:52:33 AM falls between 3/14/2023 3:18:57 PM and 3/23/2023 3:52:33 AM.
IsImprovementStdDev: Marked as improvement because 11.312005817324478 (T) = (0 -16009.373011579273) / Math.Sqrt((154450.48472976792 / (299)) + (344865.7215598864 / (27))) is greater than 1.9673127716992511 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (27) - 2, .975) and 0.07531976004050543 = (17313.41529724974 - 16009.373011579273) / 17313.41529724974 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```

### 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 20.04
Queue	AmpereUbuntu
Baseline	d6b89c66d492c1e0b0a88d797264039c50c4f4b7
Compare	ccefbf9eb36cb3d8adb36f4b141914c2c6cc489b
Diff	Diff
Configs	CompilationMode:tiered, RunKind:micro

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector
MemoryStart - Duration of single invocation	6.57 ns	5.54 ns	0.84	0.39	False
MemorySpanStartLength - Duration of single invocation	9.10 ns	7.95 ns	0.87	0.05	False
MemoryStartLengthSpan - Duration of single invocation	10.07 ns	8.91 ns	0.89	0.06	False
MemoryStartSpan - Duration of single invocation	10.16 ns	9.00 ns	0.89	0.03	False

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector
MemoryFromArray - Duration of single invocation	17.47 ns	5.94 ns	0.34	0.49	False
ArrayAsSpanStartLength - Duration of single invocation	12.90 ns	8.87 ns	0.69	0.11	False
ArrayAsSpan - Duration of single invocation	11.90 ns	7.36 ns	0.62	0.14	False
ArrayAsMemory - Duration of single invocation	19.49 ns	7.89 ns	0.40	0.50	False
ReadOnlySpanImplicitCastFromArraySegment - Duration of single invocation	5.84 ns	3.62 ns	0.62	0.28	False
SpanFromArrayStartLength - Duration of single invocation	10.93 ns	5.90 ns	0.54	0.06	False
SpanImplicitCastFromArray - Duration of single invocation	10.68 ns	4.35 ns	0.41	0.37	False
SpanFromArray - Duration of single invocation	10.47 ns	5.36 ns	0.51	0.10	False
ArrayAsMemoryStartLength - Duration of single invocation	21.57 ns	9.43 ns	0.44	0.60	False
MemoryFromArrayStartLength - Duration of single invocation	11.54 ns	6.40 ns	0.55	0.47	False
SpanImplicitCastFromArraySegment - Duration of single invocation	12.64 ns	8.62 ns	0.68	0.33	False

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector
Queue - Duration of single invocation	4.12 μs	3.50 μs	0.85	0.40	False
Stack - Duration of single invocation	3.96 μs	3.44 μs	0.87	0.52	False
ImmutableQueue - Duration of single invocation	4.64 μs	4.28 μs	0.92	0.38	False
Span - Duration of single invocation	235.05 ns	186.17 ns	0.79	0.04	False

Uh oh!

[Perf] Linux/arm64: 21 Improvements on 3/15/2023 2:24:48 AM #14414

Description

Run Information

Improvements in System.Memory.Slice<String>

Repro

Payloads

Payloads

Histogram

System.Memory.Slice<String>.MemoryStart

Description of detection logic

Description of detection logic

Description of detection logic

Description of detection logic

Docs

Run Information

Improvements in System.Memory.Constructors<String>

Repro

Payloads

Payloads

Histogram

System.Memory.Constructors<String>.MemoryFromArray

Description of detection logic

Description of detection logic

Description of detection logic

Description of detection logic

Description of detection logic

Description of detection logic

Description of detection logic

Description of detection logic

Description of detection logic

Description of detection logic

Description of detection logic

Docs

Run Information

Improvements in System.Collections.IterateForEach<String>

Repro

Payloads

Payloads

Histogram

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

Description of detection logic

Description of detection logic

Description of detection logic

Description of detection logic

Docs

Run Information

Improvements in System.Collections.Concurrent.Count<String>

Repro

Payloads

Payloads

Histogram

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

Description of detection logic

Docs

Run Information

Improvements in System.Collections.ContainsKeyTrue<String, String>

Repro

Payloads

Payloads

Histogram

System.Collections.ContainsKeyTrue<String, String>.IDictionary(Size: 512)

Description of detection logic

Docs

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