Regressions in System.Tests.Perf_Array for ARM64

### Run Information

Architecture | arm64
-- | --
OS | Windows 10.0.19041
Baseline | [b42adaddff9047e32c9d7f4145746dbb579758f2](https://github.com/dotnet/runtime/commit/b42adaddff9047e32c9d7f4145746dbb579758f2)
Compare | [ae9f1ca5717045293f726877de18a8f6cf792c5b](https://github.com/dotnet/runtime/commit/ae9f1ca5717045293f726877de18a8f6cf792c5b)
Diff | [Diff](https://github.com/dotnet/runtime/compare/b42adaddff9047e32c9d7f4145746dbb579758f2...ae9f1ca5717045293f726877de18a8f6cf792c5b)


### Regressions in System.Tests.Perf_Array

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio | Baseline ETL | Compare ETL
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[Reverse - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_Windows 10.0.19041/System.Tests.Perf_Array.Reverse.html>) | 86.87 ns | 141.59 ns | 1.63 | 0.00 | False | | |

![graph](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/04_28_2022/refs/heads/main_arm64_Windows%2010.0.19041_Regression/System.Tests.Perf_Array_1.png>)
[Test Report](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/04_28_2022/refs/heads/main_arm64_Windows%2010.0.19041_Regression/System.Tests.Perf_Array.html>)

### Repro

```cmd
git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_ci.py -f net6.0 --filter 'System.Tests.Perf_Array*'
```
<details>

### Payloads

[Baseline](<https://helixdi8s23ayyeko0k025g8.blob.core.windows.net/helix-job-3a9301c9-69d4-4666-bc77-2a8f7e81b80836ed95689fd4a548d/7d63b128-8bb5-4e72-b881-f83c5e544cdc.zip?sv=2019-07-07&se=2022-05-25T23%3A27%3A49Z&sr=c&sp=rl&sig=dsATftJtiJuyNlo9z%2FdQQz%2FBVSRqZrHgwg6%2FZ7qb1j8%3D>)
[Compare](<https://helixdi8s23ayyeko0k025g8.blob.core.windows.net/helix-job-b4b5783b-8a10-413f-9aa9-b986c11e3ba28a9d62470364aeaaa/fae376bc-4deb-4c36-a65c-01775af0abf2.zip?sv=2019-07-07&se=2022-05-26T17%3A54%3A31Z&sr=c&sp=rl&sig=5yHr6HdeGap3V%2FzYaNtbjappLCCNXy%2BzF2JPHuWxxuA%3D>)
### Histogram

#### System.Tests.Perf_Array.Reverse

```log

```
### Description of detection logic
```IsRegressionBase: Marked as regression because the compare was 5% greater than the baseline, and the value was not too small.
IsRegressionChecked: Marked as regression because the three check build points were 0.05 greater than the baseline.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
IsRegressionBase: Marked as regression because the compare was 5% greater than the baseline, and the value was not too small.
IsRegressionChecked: Marked as regression because the three check build points were 0.05 greater than the baseline.
IsRegressionWindowed: Marked as regression because 141.5902091930573 > 91.26066230361728.
IsChangePoint: Marked as a change because one of 4/26/2022 6:18:08 AM, 4/27/2022 8:46:50 AM falls between 4/19/2022 6:32:34 PM and 4/27/2022 8:46:50 AM.
IsRegressionStdDev: Marked as regression because -131.54038213427378 (T) = (0 -142.15692031098698) / Math.Sqrt((0.22062057934126858 / (35)) + (0.5115350008666868 / (3))) is less than -2.028094000977961 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (35) + (3) - 2, .025) and -0.6369040400935537 = (86.84499324887872 - 142.15692031098698) / 86.84499324887872 is less than -0.05.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
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

Architecture | arm64
-- | --
OS | Windows 10.0.19041
Baseline | [b42adaddff9047e32c9d7f4145746dbb579758f2](https://github.com/dotnet/runtime/commit/b42adaddff9047e32c9d7f4145746dbb579758f2)
Compare | [ae9f1ca5717045293f726877de18a8f6cf792c5b](https://github.com/dotnet/runtime/commit/ae9f1ca5717045293f726877de18a8f6cf792c5b)
Diff | [Diff](https://github.com/dotnet/runtime/compare/b42adaddff9047e32c9d7f4145746dbb579758f2...ae9f1ca5717045293f726877de18a8f6cf792c5b)


### Regressions in System.Memory.Span&lt;Char&gt;

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio | Baseline ETL | Compare ETL
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[Reverse - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_Windows 10.0.19041/System.Memory.Span(Char).Reverse(Size%3a%20512).html>) | 171.70 ns | 286.87 ns | 1.67 | 0.00 | False | | |

![graph](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/04_28_2022/refs/heads/main_arm64_Windows%2010.0.19041_Regression/System.Memory.Span(Char)_1.png>)
[Test Report](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/04_28_2022/refs/heads/main_arm64_Windows%2010.0.19041_Regression/System.Memory.Span(Char).html>)

### Repro

```cmd
git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_ci.py -f net6.0 --filter 'System.Memory.Span&lt;Char&gt;*'
```
<details>

### Payloads

[Baseline](<https://helixdi8s23ayyeko0k025g8.blob.core.windows.net/helix-job-3a9301c9-69d4-4666-bc77-2a8f7e81b80836ed95689fd4a548d/7d63b128-8bb5-4e72-b881-f83c5e544cdc.zip?sv=2019-07-07&se=2022-05-25T23%3A27%3A49Z&sr=c&sp=rl&sig=dsATftJtiJuyNlo9z%2FdQQz%2FBVSRqZrHgwg6%2FZ7qb1j8%3D>)
[Compare](<https://helixdi8s23ayyeko0k025g8.blob.core.windows.net/helix-job-b4b5783b-8a10-413f-9aa9-b986c11e3ba28a9d62470364aeaaa/fae376bc-4deb-4c36-a65c-01775af0abf2.zip?sv=2019-07-07&se=2022-05-26T17%3A54%3A31Z&sr=c&sp=rl&sig=5yHr6HdeGap3V%2FzYaNtbjappLCCNXy%2BzF2JPHuWxxuA%3D>)
### Histogram

#### System.Memory.Span&lt;Char&gt;.Reverse(Size: 512)

```log

```
### Description of detection logic
```IsRegressionBase: Marked as regression because the compare was 5% greater than the baseline, and the value was not too small.
IsRegressionChecked: Marked as regression because the three check build points were 0.05 greater than the baseline.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
IsRegressionBase: Marked as regression because the compare was 5% greater than the baseline, and the value was not too small.
IsRegressionChecked: Marked as regression because the three check build points were 0.05 greater than the baseline.
IsRegressionWindowed: Marked as regression because 286.8743261808392 > 180.59975390646315.
IsChangePoint: Marked as a change because one of 4/26/2022 6:18:08 AM, 4/27/2022 8:46:50 AM falls between 4/19/2022 6:32:34 PM and 4/27/2022 8:46:50 AM.
IsRegressionStdDev: Marked as regression because -227.30060518890855 (T) = (0 -286.39017242473375) / Math.Sqrt((1.9498782004738482 / (35)) + (0.5830247902076874 / (3))) is less than -2.028094000977961 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (35) + (3) - 2, .025) and -0.6580417757183983 = (172.72795934266873 - 286.39017242473375) / 172.72795934266873 is less than -0.05.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
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

Architecture | arm64
-- | --
OS | Windows 10.0.19041
Baseline | [b42adaddff9047e32c9d7f4145746dbb579758f2](https://github.com/dotnet/runtime/commit/b42adaddff9047e32c9d7f4145746dbb579758f2)
Compare | [ae9f1ca5717045293f726877de18a8f6cf792c5b](https://github.com/dotnet/runtime/commit/ae9f1ca5717045293f726877de18a8f6cf792c5b)
Diff | [Diff](https://github.com/dotnet/runtime/compare/b42adaddff9047e32c9d7f4145746dbb579758f2...ae9f1ca5717045293f726877de18a8f6cf792c5b)


### Regressions in System.Memory.Span&lt;Byte&gt;

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio | Baseline ETL | Compare ETL
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[Reverse - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_Windows 10.0.19041/System.Memory.Span(Byte).Reverse(Size%3a%20512).html>) | 173.49 ns | 236.54 ns | 1.36 | 0.00 | False | | |

![graph](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/04_28_2022/refs/heads/main_arm64_Windows%2010.0.19041_Regression/System.Memory.Span(Byte)_1.png>)
[Test Report](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/04_28_2022/refs/heads/main_arm64_Windows%2010.0.19041_Regression/System.Memory.Span(Byte).html>)

### Repro

```cmd
git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_ci.py -f net6.0 --filter 'System.Memory.Span&lt;Byte&gt;*'
```
<details>

### Payloads

[Baseline](<https://helixdi8s23ayyeko0k025g8.blob.core.windows.net/helix-job-3a9301c9-69d4-4666-bc77-2a8f7e81b80836ed95689fd4a548d/7d63b128-8bb5-4e72-b881-f83c5e544cdc.zip?sv=2019-07-07&se=2022-05-25T23%3A27%3A49Z&sr=c&sp=rl&sig=dsATftJtiJuyNlo9z%2FdQQz%2FBVSRqZrHgwg6%2FZ7qb1j8%3D>)
[Compare](<https://helixdi8s23ayyeko0k025g8.blob.core.windows.net/helix-job-b4b5783b-8a10-413f-9aa9-b986c11e3ba28a9d62470364aeaaa/fae376bc-4deb-4c36-a65c-01775af0abf2.zip?sv=2019-07-07&se=2022-05-26T17%3A54%3A31Z&sr=c&sp=rl&sig=5yHr6HdeGap3V%2FzYaNtbjappLCCNXy%2BzF2JPHuWxxuA%3D>)
### Histogram

#### System.Memory.Span&lt;Byte&gt;.Reverse(Size: 512)

```log

```
### Description of detection logic
```IsRegressionBase: Marked as regression because the compare was 5% greater than the baseline, and the value was not too small.
IsRegressionChecked: Marked as regression because the three check build points were 0.05 greater than the baseline.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
IsRegressionBase: Marked as regression because the compare was 5% greater than the baseline, and the value was not too small.
IsRegressionChecked: Marked as regression because the three check build points were 0.05 greater than the baseline.
IsRegressionWindowed: Marked as regression because 236.54396131211246 > 182.10393200384888.
IsChangePoint: Marked as a change because one of 4/26/2022 6:18:08 AM, 4/27/2022 8:46:50 AM falls between 4/19/2022 6:32:34 PM and 4/27/2022 8:46:50 AM.
IsRegressionStdDev: Marked as regression because -126.16357924033326 (T) = (0 -236.0946824240651) / Math.Sqrt((1.7492659048874621 / (35)) + (0.6067386409791822 / (3))) is less than -2.028094000977961 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (35) + (3) - 2, .025) and -0.3668204454251107 = (172.73277058028975 - 236.0946824240651) / 172.73277058028975 is less than -0.05.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
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>




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Regressions in System.Tests.Perf_Array for ARM64 #68667

Run Information