[Perf] Linux/arm64: 29 Improvements on 8/17/2022 3:53:31 PM

### Run Information

Architecture | arm64
-- | --
OS | ubuntu 20.04
Baseline | [96d1c8e3ba4bc94afdcf15ee2896a3bc984820e7](https://github.com/dotnet/runtime/commit/96d1c8e3ba4bc94afdcf15ee2896a3bc984820e7)
Compare | [6521c2b7c01660873fa978c9e73038a1d75e7962](https://github.com/dotnet/runtime/commit/6521c2b7c01660873fa978c9e73038a1d75e7962)
Diff | [Diff](https://github.com/dotnet/runtime/compare/96d1c8e3ba4bc94afdcf15ee2896a3bc984820e7...6521c2b7c01660873fa978c9e73038a1d75e7962)


### Improvements in System.Tests.Perf_String

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio | Baseline ETL | Compare ETL
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[Replace_Char - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Tests.Perf_String.Replace_Char(text%3a%20%22This%20is%20a%20very%20nice%20sentence%22%2c%20oldChar%3a%20%27z%27%2c%20newChar%3a%20%27y%27).html>) | 12.42 ns | 6.52 ns | 0.53 | 0.24 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_25_2022/refs/heads/main_arm64_ubuntu%2020.04_Improvement/System.Tests.Perf_String_1.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_25_2022/refs/heads/main_arm64_ubuntu%2020.04_Improvement/System.Tests.Perf_String.html>)

### Repro

```cmd
git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_ci.py -f net6.0 --filter 'System.Tests.Perf_String*'
```
<details>

### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-251cf814-66ba-4bdb-8b1e-a3bc81981edf8d2ad80f155406095/924b7ca1-53e5-40b0-81a1-cb029522d68c.zip?sv=2021-08-06&se=2022-09-16T08%3A03%3A32Z&sr=c&sp=rl&sig=tlei2jMeB2%2FazuftKJG4k4y8IfSa1fIbF%2BS1AOFhE0U%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-b6d2b8c0-7d9f-4d1c-967b-ade6213bced97e0f29e25ef40478c/76c96e82-788a-4a34-8fd4-dcd44a523711.zip?sv=2021-08-06&se=2022-09-16T21%3A53%3A37Z&sr=c&sp=rl&sig=TN6sGH4MptMGS0TecLuH6FF1qOlkpFTEkSiS2Pj7H%2Bw%3D>)
### Histogram

#### System.Tests.Perf_String.Replace_Char(text: "This is a very nice sentence", oldChar: 'z', newChar: 'y')

```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 6.5231315475069795 < 11.79517534599318.
IsChangePoint: Marked as a change because one of 8/17/2022 10:14:53 AM, 8/25/2022 6:55:57 AM falls between 8/16/2022 2:19:13 PM and 8/25/2022 6:55:57 AM.
IsImprovementStdDev: Marked as improvement because 62.73948931126887 (T) = (0 -6.75886029661809) / Math.Sqrt((0.4465356628006159 / (299)) + (0.29335227870669617 / (33))) is greater than 1.9671786747533526 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (33) - 2, .975) and 0.48608832435167293 = (13.151793619188407 - 6.75886029661809) / 13.151793619188407 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

Architecture | arm64
-- | --
OS | ubuntu 20.04
Baseline | [96d1c8e3ba4bc94afdcf15ee2896a3bc984820e7](https://github.com/dotnet/runtime/commit/96d1c8e3ba4bc94afdcf15ee2896a3bc984820e7)
Compare | [6521c2b7c01660873fa978c9e73038a1d75e7962](https://github.com/dotnet/runtime/commit/6521c2b7c01660873fa978c9e73038a1d75e7962)
Diff | [Diff](https://github.com/dotnet/runtime/compare/96d1c8e3ba4bc94afdcf15ee2896a3bc984820e7...6521c2b7c01660873fa978c9e73038a1d75e7962)


### Improvements in System.Collections.ContainsTrue&lt;Int32&gt;

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio | Baseline ETL | Compare ETL
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[ICollection - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Collections.ContainsTrue(Int32).ICollection(Size%3a%20512).html>) | 44.63 μs | 34.73 μs | 0.78 | 0.01 | False | | |
[Span - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Collections.ContainsTrue(Int32).Span(Size%3a%20512).html>) | 40.86 μs | 30.99 μs | 0.76 | 0.01 | False | | |
[ImmutableArray - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Collections.ContainsTrue(Int32).ImmutableArray(Size%3a%20512).html>) | 46.34 μs | 35.19 μs | 0.76 | 0.01 | False | | |
[Array - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Collections.ContainsTrue(Int32).Array(Size%3a%20512).html>) | 45.34 μs | 34.82 μs | 0.77 | 0.01 | False | | |
[Queue - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Collections.ContainsTrue(Int32).Queue(Size%3a%20512).html>) | 45.63 μs | 34.28 μs | 0.75 | 0.01 | False | | |
[List - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Collections.ContainsTrue(Int32).List(Size%3a%20512).html>) | 43.21 μs | 33.93 μs | 0.79 | 0.01 | False | | |
[Stack - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Collections.ContainsTrue(Int32).Stack(Size%3a%20512).html>) | 53.14 μs | 34.46 μs | 0.65 | 0.00 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_25_2022/refs/heads/main_arm64_ubuntu%2020.04_Improvement/System.Collections.ContainsTrue(Int32)_1.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_25_2022/refs/heads/main_arm64_ubuntu%2020.04_Improvement/System.Collections.ContainsTrue(Int32)_2.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_25_2022/refs/heads/main_arm64_ubuntu%2020.04_Improvement/System.Collections.ContainsTrue(Int32)_3.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_25_2022/refs/heads/main_arm64_ubuntu%2020.04_Improvement/System.Collections.ContainsTrue(Int32)_4.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_25_2022/refs/heads/main_arm64_ubuntu%2020.04_Improvement/System.Collections.ContainsTrue(Int32)_5.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_25_2022/refs/heads/main_arm64_ubuntu%2020.04_Improvement/System.Collections.ContainsTrue(Int32)_6.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_25_2022/refs/heads/main_arm64_ubuntu%2020.04_Improvement/System.Collections.ContainsTrue(Int32)_7.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_25_2022/refs/heads/main_arm64_ubuntu%2020.04_Improvement/System.Collections.ContainsTrue(Int32).html>)

### Repro

```cmd
git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_ci.py -f net6.0 --filter 'System.Collections.ContainsTrue&lt;Int32&gt;*'
```
<details>

### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-251cf814-66ba-4bdb-8b1e-a3bc81981edf8d2ad80f155406095/924b7ca1-53e5-40b0-81a1-cb029522d68c.zip?sv=2021-08-06&se=2022-09-16T08%3A03%3A32Z&sr=c&sp=rl&sig=tlei2jMeB2%2FazuftKJG4k4y8IfSa1fIbF%2BS1AOFhE0U%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-b6d2b8c0-7d9f-4d1c-967b-ade6213bced97e0f29e25ef40478c/76c96e82-788a-4a34-8fd4-dcd44a523711.zip?sv=2021-08-06&se=2022-09-16T21%3A53%3A37Z&sr=c&sp=rl&sig=TN6sGH4MptMGS0TecLuH6FF1qOlkpFTEkSiS2Pj7H%2Bw%3D>)
### Histogram

#### System.Collections.ContainsTrue&lt;Int32&gt;.ICollection(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 34.72802012806236 < 42.41065817891695.
IsChangePoint: Marked as a change because one of 7/9/2022 5:50:00 AM, 7/27/2022 9:27:06 AM, 8/17/2022 10:14:53 AM, 8/25/2022 6:55:57 AM falls between 8/16/2022 2:19:13 PM and 8/25/2022 6:55:57 AM.
IsImprovementStdDev: Marked as improvement because 48.23028228355623 (T) = (0 -34653.8017536975) / Math.Sqrt((8439848.663259981 / (299)) + (89142.50295225113 / (33))) is greater than 1.9671786747533526 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (33) - 2, .975) and 0.1966344072557995 = (43135.78035539744 - 34653.8017536975) / 43135.78035539744 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```#### System.Collections.ContainsTrue&lt;Int32&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 30.987820256916994 < 38.81887260467175.
IsChangePoint: Marked as a change because one of 7/9/2022 5:50:00 AM, 7/27/2022 9:27:06 AM, 8/17/2022 10:14:53 AM, 8/25/2022 6:55:57 AM falls between 8/16/2022 2:19:13 PM and 8/25/2022 6:55:57 AM.
IsImprovementStdDev: Marked as improvement because 50.067394528286634 (T) = (0 -30744.00857484454) / Math.Sqrt((7109320.796897707 / (299)) + (230899.03150174508 / (33))) is greater than 1.9671786747533526 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (33) - 2, .975) and 0.22220393377347555 = (39527.081596078286 - 30744.00857484454) / 39527.081596078286 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```#### System.Collections.ContainsTrue&lt;Int32&gt;.ImmutableArray(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 35.19234878277153 < 44.04607807856368.
IsChangePoint: Marked as a change because one of 7/9/2022 5:50:00 AM, 7/27/2022 9:27:06 AM, 8/17/2022 10:14:53 AM, 8/25/2022 6:55:57 AM falls between 8/16/2022 2:19:13 PM and 8/25/2022 6:55:57 AM.
IsImprovementStdDev: Marked as improvement because 55.9281162679861 (T) = (0 -35439.151686886165) / Math.Sqrt((6830494.382950892 / (299)) + (93158.27999421963 / (33))) is greater than 1.9671786747533526 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (33) - 2, .975) and 0.20181065306128174 = (44399.42956242817 - 35439.151686886165) / 44399.42956242817 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```#### System.Collections.ContainsTrue&lt;Int32&gt;.Array(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 34.82390755382332 < 43.18217401846453.
IsChangePoint: Marked as a change because one of 7/9/2022 5:50:00 AM, 7/27/2022 9:27:06 AM, 8/17/2022 10:14:53 AM, 8/25/2022 6:55:57 AM falls between 8/16/2022 2:19:13 PM and 8/25/2022 6:55:57 AM.
IsImprovementStdDev: Marked as improvement because 54.10975524046876 (T) = (0 -34804.546152283314) / Math.Sqrt((8303620.337159046 / (299)) + (33327.18722123325 / (33))) is greater than 1.9671786747533526 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (33) - 2, .975) and 0.20870491015066514 = (43984.28171582641 - 34804.546152283314) / 43984.28171582641 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```#### System.Collections.ContainsTrue&lt;Int32&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 34.28146618131868 < 43.31119880776569.
IsChangePoint: Marked as a change because one of 7/9/2022 5:50:00 AM, 7/27/2022 9:27:06 AM, 8/17/2022 10:14:53 AM, 8/25/2022 6:55:57 AM falls between 8/16/2022 2:19:13 PM and 8/25/2022 6:55:57 AM.
IsImprovementStdDev: Marked as improvement because 59.51203033578766 (T) = (0 -34371.81313649882) / Math.Sqrt((7350849.133431905 / (299)) + (46918.048478518285 / (33))) is greater than 1.9671786747533526 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (33) - 2, .975) and 0.218272488202218 = (43969.046269654835 - 34371.81313649882) / 43969.046269654835 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```#### System.Collections.ContainsTrue&lt;Int32&gt;.List(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 33.92801268155411 < 41.0785154471685.
IsChangePoint: Marked as a change because one of 7/9/2022 5:50:00 AM, 7/27/2022 9:27:06 AM, 8/17/2022 10:14:53 AM, 8/25/2022 6:55:57 AM falls between 8/16/2022 2:19:13 PM and 8/25/2022 6:55:57 AM.
IsImprovementStdDev: Marked as improvement because 48.14745919069968 (T) = (0 -33873.690572516105) / Math.Sqrt((8023880.333197511 / (299)) + (35966.383448329914 / (33))) is greater than 1.9671786747533526 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (33) - 2, .975) and 0.1919365413032257 = (41919.592091377075 - 33873.690572516105) / 41919.592091377075 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```#### System.Collections.ContainsTrue&lt;Int32&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 34.46220171622614 < 50.460943178354725.
IsChangePoint: Marked as a change because one of 8/17/2022 10:14:53 AM, 8/25/2022 6:55:57 AM falls between 8/16/2022 2:19:13 PM and 8/25/2022 6:55:57 AM.
IsImprovementStdDev: Marked as improvement because 190.64762470518656 (T) = (0 -33889.58188633876) / Math.Sqrt((6118.830866395206 / (299)) + (336553.8288407974 / (33))) is greater than 1.9671786747533526 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (33) - 2, .975) and 0.36252285511034754 = (53162.034369412664 - 33889.58188633876) / 53162.034369412664 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

Architecture | arm64
-- | --
OS | ubuntu 20.04
Baseline | [96d1c8e3ba4bc94afdcf15ee2896a3bc984820e7](https://github.com/dotnet/runtime/commit/96d1c8e3ba4bc94afdcf15ee2896a3bc984820e7)
Compare | [6521c2b7c01660873fa978c9e73038a1d75e7962](https://github.com/dotnet/runtime/commit/6521c2b7c01660873fa978c9e73038a1d75e7962)
Diff | [Diff](https://github.com/dotnet/runtime/compare/96d1c8e3ba4bc94afdcf15ee2896a3bc984820e7...6521c2b7c01660873fa978c9e73038a1d75e7962)


### Improvements in System.Tests.Perf_Array

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio | Baseline ETL | Compare ETL
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[IndexOfShort - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Tests.Perf_Array.IndexOfShort.html>) | 16.42 ns | 10.65 ns | 0.65 | 0.20 | False | | |
[IndexOfChar - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Tests.Perf_Array.IndexOfChar.html>) | 14.17 ns | 11.22 ns | 0.79 | 0.18 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_25_2022/refs/heads/main_arm64_ubuntu%2020.04_Improvement/System.Tests.Perf_Array_1.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_25_2022/refs/heads/main_arm64_ubuntu%2020.04_Improvement/System.Tests.Perf_Array_2.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_25_2022/refs/heads/main_arm64_ubuntu%2020.04_Improvement/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://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-251cf814-66ba-4bdb-8b1e-a3bc81981edf8d2ad80f155406095/924b7ca1-53e5-40b0-81a1-cb029522d68c.zip?sv=2021-08-06&se=2022-09-16T08%3A03%3A32Z&sr=c&sp=rl&sig=tlei2jMeB2%2FazuftKJG4k4y8IfSa1fIbF%2BS1AOFhE0U%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-b6d2b8c0-7d9f-4d1c-967b-ade6213bced97e0f29e25ef40478c/76c96e82-788a-4a34-8fd4-dcd44a523711.zip?sv=2021-08-06&se=2022-09-16T21%3A53%3A37Z&sr=c&sp=rl&sig=TN6sGH4MptMGS0TecLuH6FF1qOlkpFTEkSiS2Pj7H%2Bw%3D>)
### Histogram

#### System.Tests.Perf_Array.IndexOfShort

```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 10.649194573085937 < 15.433609587801284.
IsChangePoint: Marked as a change because one of 5/31/2022 5:02:26 PM, 6/21/2022 3:41:14 AM, 8/17/2022 10:14:53 AM, 8/25/2022 6:55:57 AM falls between 8/16/2022 2:19:13 PM and 8/25/2022 6:55:57 AM.
IsImprovementStdDev: Marked as improvement because 53.11044476233621 (T) = (0 -11.826736650997166) / Math.Sqrt((1.0137946413454975 / (299)) + (0.19952261332451512 / (33))) is greater than 1.9671786747533526 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (33) - 2, .975) and 0.3037379852877427 = (16.986043186464475 - 11.826736650997166) / 16.986043186464475 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```#### System.Tests.Perf_Array.IndexOfChar

```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 11.215209773889082 < 13.027853196637492.
IsChangePoint: Marked as a change because one of 5/31/2022 5:02:26 PM, 6/6/2022 8:15:49 PM, 6/19/2022 8:44:36 PM, 7/28/2022 12:19:57 AM, 8/17/2022 10:14:53 AM, 8/25/2022 6:55:57 AM falls between 8/16/2022 2:19:13 PM and 8/25/2022 6:55:57 AM.
IsImprovementStdDev: Marked as improvement because 52.62154063247325 (T) = (0 -11.126090772955093) / Math.Sqrt((1.2654810938407839 / (299)) + (0.00923389875040985 / (32))) is greater than 1.9672006833568965 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (32) - 2, .975) and 0.24127807093317116 = (14.664253591087517 - 11.126090772955093) / 14.664253591087517 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

Architecture | arm64
-- | --
OS | ubuntu 20.04
Baseline | [96d1c8e3ba4bc94afdcf15ee2896a3bc984820e7](https://github.com/dotnet/runtime/commit/96d1c8e3ba4bc94afdcf15ee2896a3bc984820e7)
Compare | [6521c2b7c01660873fa978c9e73038a1d75e7962](https://github.com/dotnet/runtime/commit/6521c2b7c01660873fa978c9e73038a1d75e7962)
Diff | [Diff](https://github.com/dotnet/runtime/compare/96d1c8e3ba4bc94afdcf15ee2896a3bc984820e7...6521c2b7c01660873fa978c9e73038a1d75e7962)


### Improvements in System.Memory.ReadOnlySpan

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio | Baseline ETL | Compare ETL
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[IndexOfString - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Memory.ReadOnlySpan.IndexOfString(input%3a%20%22%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0.html>) | 71.01 ns | 61.49 ns | 0.87 | 0.01 | False | | |
[IndexOfString - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Memory.ReadOnlySpan.IndexOfString(input%3a%20%22%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%99%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%e3%81%a0%22%2c%20value%3a%20%22%e3%81%99%22%2c%20comparisonType%3a%20Ordinal).html>) | 18.71 ns | 14.50 ns | 0.78 | 0.02 | False | | |
[IndexOfString - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Memory.ReadOnlySpan.IndexOfString(input%3a%20%22Hello%20Worldbbbbbbbbbbbbbbcbbbbbbbbbbbbbbbbbbba!%22%2c%20value%3a%20%22y%22%2c%20comparisonType%3a%20Ordinal).html>) | 18.08 ns | 12.15 ns | 0.67 | 0.01 | False | | |
[IndexOfString - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Memory.ReadOnlySpan.IndexOfString(input%3a%20%22Hello%20WorldbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbareallyreallylongHello%20WorldbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbareallyreallylongHello%20Worldbbbbbbbbbbbbbbbbbbb.html>) | 14.52 ns | 12.60 ns | 0.87 | 0.02 | False | | |
[IndexOfString - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Memory.ReadOnlySpan.IndexOfString(input%3a%20%22AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA.html>) | 70.96 ns | 61.47 ns | 0.87 | 0.01 | False | | |
[IndexOfString - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Memory.ReadOnlySpan.IndexOfString(input%3a%20%22Hello%20WorldbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbareallyreallylongHello%20WorldbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbareallyreallylongHello%20Worldbbbbbbbbbbbbbbbbbb.html>) | 32.91 ns | 27.50 ns | 0.84 | 0.03 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_25_2022/refs/heads/main_arm64_ubuntu%2020.04_Improvement/System.Memory.ReadOnlySpan_3.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_25_2022/refs/heads/main_arm64_ubuntu%2020.04_Improvement/System.Memory.ReadOnlySpan_4.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_25_2022/refs/heads/main_arm64_ubuntu%2020.04_Improvement/System.Memory.ReadOnlySpan_5.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_25_2022/refs/heads/main_arm64_ubuntu%2020.04_Improvement/System.Memory.ReadOnlySpan_6.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_25_2022/refs/heads/main_arm64_ubuntu%2020.04_Improvement/System.Memory.ReadOnlySpan.html>)

### Repro

```cmd
git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_ci.py -f net6.0 --filter 'System.Memory.ReadOnlySpan*'
```
<details>

### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-251cf814-66ba-4bdb-8b1e-a3bc81981edf8d2ad80f155406095/924b7ca1-53e5-40b0-81a1-cb029522d68c.zip?sv=2021-08-06&se=2022-09-16T08%3A03%3A32Z&sr=c&sp=rl&sig=tlei2jMeB2%2FazuftKJG4k4y8IfSa1fIbF%2BS1AOFhE0U%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-b6d2b8c0-7d9f-4d1c-967b-ade6213bced97e0f29e25ef40478c/76c96e82-788a-4a34-8fd4-dcd44a523711.zip?sv=2021-08-06&se=2022-09-16T21%3A53%3A37Z&sr=c&sp=rl&sig=TN6sGH4MptMGS0TecLuH6FF1qOlkpFTEkSiS2Pj7H%2Bw%3D>)
### Histogram

#### System.Memory.ReadOnlySpan.IndexOfString(input: "だだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだxだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだ", value: "x", comparisonType: Ordinal)

```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 61.48677642487121 < 67.46144209617378.
IsChangePoint: Marked as a change because one of 5/31/2022 5:02:26 PM, 6/6/2022 8:15:49 PM, 8/17/2022 10:14:53 AM, 8/25/2022 6:55:57 AM falls between 8/16/2022 2:19:13 PM and 8/25/2022 6:55:57 AM.
IsImprovementStdDev: Marked as improvement because 120.25621663306836 (T) = (0 -61.46699594474983) / Math.Sqrt((1.2649407581760685 / (299)) + (0.002233120964248395 / (33))) is greater than 1.9671786747533526 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (33) - 2, .975) and 0.11368404507941063 = (69.35111074499054 - 61.46699594474983) / 69.35111074499054 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```#### System.Memory.ReadOnlySpan.IndexOfString(input: "だだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだすだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだだ", value: "す", comparisonType: Ordinal)

```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 14.500239911574536 < 17.76303295353707.
IsChangePoint: Marked as a change because one of 5/31/2022 5:02:26 PM, 6/6/2022 8:15:49 PM, 7/2/2022 7:35:06 PM, 7/6/2022 3:55:24 AM, 8/5/2022 6:57:51 AM, 8/17/2022 10:14:53 AM, 8/25/2022 6:55:57 AM falls between 8/16/2022 2:19:13 PM and 8/25/2022 6:55:57 AM.
IsImprovementStdDev: Marked as improvement because 67.16022623426625 (T) = (0 -14.528585053881052) / Math.Sqrt((0.6493278346720135 / (299)) + (0.002209381763136355 / (33))) is greater than 1.9671786747533526 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (33) - 2, .975) and 0.179463635434491 = (17.70620496700867 - 14.528585053881052) / 17.70620496700867 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```#### System.Memory.ReadOnlySpan.IndexOfString(input: "Hello Worldbbbbbbbbbbbbbbcbbbbbbbbbbbbbbbbbbba!", value: "y", comparisonType: Ordinal)

```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 12.152080452773252 < 17.199338289356664.
IsChangePoint: Marked as a change because one of 8/17/2022 10:14:53 AM, 8/25/2022 6:55:57 AM falls between 8/16/2022 2:19:13 PM and 8/25/2022 6:55:57 AM.
IsImprovementStdDev: Marked as improvement because 177.05049479250712 (T) = (0 -12.150656921670395) / Math.Sqrt((0.33761072694985805 / (299)) + (0.001815890505464511 / (33))) is greater than 1.9671786747533526 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (33) - 2, .975) and 0.33396430840309466 = (18.24325193825221 - 12.150656921670395) / 18.24325193825221 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```#### System.Memory.ReadOnlySpan.IndexOfString(input: "Hello WorldbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbareallyreallylongHello WorldbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbareallyreallylongHello Worldbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbareallyreallylong!xyz", value: "w", comparisonType: OrdinalIgnoreCase)

```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 12.598568813611779 < 13.770746576915569.
IsChangePoint: Marked as a change because one of 7/2/2022 7:35:06 PM, 7/6/2022 3:55:24 AM, 8/17/2022 10:14:53 AM, 8/25/2022 6:55:57 AM falls between 8/16/2022 2:19:13 PM and 8/25/2022 6:55:57 AM.
IsImprovementStdDev: Marked as improvement because 17.342987889253486 (T) = (0 -12.620208239465788) / Math.Sqrt((3.2560039275464274 / (299)) + (0.001055900393090534 / (33))) is greater than 1.9671786747533526 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (33) - 2, .975) and 0.12558024684211588 = (14.432665998096567 - 12.620208239465788) / 14.432665998096567 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```#### System.Memory.ReadOnlySpan.IndexOfString(input: "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAXAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA", value: "X", comparisonType: Ordinal)

```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 61.47040166037251 < 67.46701166580884.
IsChangePoint: Marked as a change because one of 5/31/2022 5:02:26 PM, 6/6/2022 8:15:49 PM, 8/17/2022 10:14:53 AM, 8/25/2022 6:55:57 AM falls between 8/16/2022 2:19:13 PM and 8/25/2022 6:55:57 AM.
IsImprovementStdDev: Marked as improvement because 124.9083369074399 (T) = (0 -61.452813092344904) / Math.Sqrt((1.1725789972381613 / (299)) + (0.002273056568323024 / (33))) is greater than 1.9671786747533526 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (33) - 2, .975) and 0.11378966374206156 = (69.3433720845912 - 61.452813092344904) / 69.3433720845912 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```#### System.Memory.ReadOnlySpan.IndexOfString(input: "Hello WorldbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbareallyreallylongHello WorldbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbareallyreallylongHello Worldbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbareallyreallylong!xyz", value: "~", comparisonType: Ordinal)

```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 27.503908734411084 < 31.29310345494526.
IsChangePoint: Marked as a change because one of 5/31/2022 5:02:26 PM, 6/6/2022 8:15:49 PM, 8/17/2022 10:14:53 AM, 8/25/2022 6:55:57 AM falls between 8/16/2022 2:19:13 PM and 8/25/2022 6:55:57 AM.
IsImprovementStdDev: Marked as improvement because 89.64002776127477 (T) = (0 -27.615359671909303) / Math.Sqrt((1.2083728582286504 / (299)) + (0.011603186494285813 / (33))) is greater than 1.9671786747533526 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (33) - 2, .975) and 0.17705302892174452 = (33.556669679124816 - 27.615359671909303) / 33.556669679124816 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

Architecture | arm64
-- | --
OS | ubuntu 20.04
Baseline | [96d1c8e3ba4bc94afdcf15ee2896a3bc984820e7](https://github.com/dotnet/runtime/commit/96d1c8e3ba4bc94afdcf15ee2896a3bc984820e7)
Compare | [6521c2b7c01660873fa978c9e73038a1d75e7962](https://github.com/dotnet/runtime/commit/6521c2b7c01660873fa978c9e73038a1d75e7962)
Diff | [Diff](https://github.com/dotnet/runtime/compare/96d1c8e3ba4bc94afdcf15ee2896a3bc984820e7...6521c2b7c01660873fa978c9e73038a1d75e7962)


### Improvements in System.Collections.ContainsFalse&lt;Int32&gt;

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio | Baseline ETL | Compare ETL
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[List - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Collections.ContainsFalse(Int32).List(Size%3a%20512).html>) | 68.99 μs | 57.39 μs | 0.83 | 0.01 | False | | |
[Array - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Collections.ContainsFalse(Int32).Array(Size%3a%20512).html>) | 70.37 μs | 58.24 μs | 0.83 | 0.01 | False | | |
[Stack - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Collections.ContainsFalse(Int32).Stack(Size%3a%20512).html>) | 102.49 μs | 56.51 μs | 0.55 | 0.00 | False | | |
[ImmutableArray - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Collections.ContainsFalse(Int32).ImmutableArray(Size%3a%20512).html>) | 70.36 μs | 60.38 μs | 0.86 | 0.01 | False | | |
[ICollection - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Collections.ContainsFalse(Int32).ICollection(Size%3a%20512).html>) | 69.59 μs | 58.03 μs | 0.83 | 0.01 | False | | |
[Queue - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Collections.ContainsFalse(Int32).Queue(Size%3a%20512).html>) | 72.43 μs | 61.61 μs | 0.85 | 0.01 | False | | |
[Span - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Collections.ContainsFalse(Int32).Span(Size%3a%20512).html>) | 67.68 μs | 53.24 μs | 0.79 | 0.02 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_25_2022/refs/heads/main_arm64_ubuntu%2020.04_Improvement/System.Collections.ContainsFalse(Int32)_1.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_25_2022/refs/heads/main_arm64_ubuntu%2020.04_Improvement/System.Collections.ContainsFalse(Int32)_2.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_25_2022/refs/heads/main_arm64_ubuntu%2020.04_Improvement/System.Collections.ContainsFalse(Int32)_3.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_25_2022/refs/heads/main_arm64_ubuntu%2020.04_Improvement/System.Collections.ContainsFalse(Int32)_4.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_25_2022/refs/heads/main_arm64_ubuntu%2020.04_Improvement/System.Collections.ContainsFalse(Int32)_5.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_25_2022/refs/heads/main_arm64_ubuntu%2020.04_Improvement/System.Collections.ContainsFalse(Int32)_6.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_25_2022/refs/heads/main_arm64_ubuntu%2020.04_Improvement/System.Collections.ContainsFalse(Int32)_7.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/08_25_2022/refs/heads/main_arm64_ubuntu%2020.04_Improvement/System.Collections.ContainsFalse(Int32).html>)

### Repro

```cmd
git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_ci.py -f net6.0 --filter 'System.Collections.ContainsFalse&lt;Int32&gt;*'
```
<details>

### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-251cf814-66ba-4bdb-8b1e-a3bc81981edf8d2ad80f155406095/924b7ca1-53e5-40b0-81a1-cb029522d68c.zip?sv=2021-08-06&se=2022-09-16T08%3A03%3A32Z&sr=c&sp=rl&sig=tlei2jMeB2%2FazuftKJG4k4y8IfSa1fIbF%2BS1AOFhE0U%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-b6d2b8c0-7d9f-4d1c-967b-ade6213bced97e0f29e25ef40478c/76c96e82-788a-4a34-8fd4-dcd44a523711.zip?sv=2021-08-06&se=2022-09-16T21%3A53%3A37Z&sr=c&sp=rl&sig=TN6sGH4MptMGS0TecLuH6FF1qOlkpFTEkSiS2Pj7H%2Bw%3D>)
### Histogram

#### System.Collections.ContainsFalse&lt;Int32&gt;.List(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 57.39248531527996 < 65.59012537340047.
IsChangePoint: Marked as a change because one of 7/9/2022 5:50:00 AM, 7/27/2022 9:27:06 AM, 8/17/2022 10:14:53 AM, 8/25/2022 6:55:57 AM falls between 8/16/2022 2:19:13 PM and 8/25/2022 6:55:57 AM.
IsImprovementStdDev: Marked as improvement because 76.69986882427078 (T) = (0 -57602.991101675936) / Math.Sqrt((4025806.8765011714 / (299)) + (137796.4679981946 / (33))) is greater than 1.9671786747533526 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (33) - 2, .975) and 0.15027181043776552 = (67789.90247616949 - 57602.991101675936) / 67789.90247616949 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```#### System.Collections.ContainsFalse&lt;Int32&gt;.Array(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 58.235733771804384 < 66.51402150521255.
IsChangePoint: Marked as a change because one of 7/9/2022 5:50:00 AM, 7/27/2022 9:27:06 AM, 8/17/2022 10:14:53 AM, 8/25/2022 6:55:57 AM falls between 8/16/2022 2:19:13 PM and 8/25/2022 6:55:57 AM.
IsImprovementStdDev: Marked as improvement because 75.54724997044683 (T) = (0 -58310.01247635288) / Math.Sqrt((5151847.150959256 / (299)) + (75762.24781371198 / (33))) is greater than 1.9671786747533526 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (33) - 2, .975) and 0.15329118467356376 = (68866.66516383475 - 58310.01247635288) / 68866.66516383475 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```#### System.Collections.ContainsFalse&lt;Int32&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 56.51486356220495 < 97.36379672792994.
IsChangePoint: Marked as a change because one of 8/17/2022 10:14:53 AM, 8/25/2022 6:55:57 AM falls between 8/16/2022 2:19:13 PM and 8/25/2022 6:55:57 AM.
IsImprovementStdDev: Marked as improvement because 245.32011854271116 (T) = (0 -56796.51071135819) / Math.Sqrt((1759.5656243410515 / (299)) + (1144899.7984588745 / (33))) is greater than 1.9671786747533526 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (33) - 2, .975) and 0.4458577802180442 = (102494.46565126641 - 56796.51071135819) / 102494.46565126641 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```#### System.Collections.ContainsFalse&lt;Int32&gt;.ImmutableArray(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 60.3755062097812 < 66.84699489810217.
IsChangePoint: Marked as a change because one of 7/9/2022 5:50:00 AM, 7/27/2022 9:27:06 AM, 8/17/2022 10:14:53 AM, 8/25/2022 6:55:57 AM falls between 8/16/2022 2:19:13 PM and 8/25/2022 6:55:57 AM.
IsImprovementStdDev: Marked as improvement because 61.41840531870277 (T) = (0 -60047.38219103274) / Math.Sqrt((5241924.327868077 / (299)) + (199450.8164358406 / (33))) is greater than 1.9671786747533526 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (33) - 2, .975) and 0.13573225593982288 = (69477.7545543245 - 60047.38219103274) / 69477.7545543245 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```#### System.Collections.ContainsFalse&lt;Int32&gt;.ICollection(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 58.025180003561246 < 66.6751223024103.
IsChangePoint: Marked as a change because one of 7/9/2022 5:50:00 AM, 7/27/2022 9:27:06 AM, 8/17/2022 10:14:53 AM, 8/25/2022 6:55:57 AM falls between 8/16/2022 2:19:13 PM and 8/25/2022 6:55:57 AM.
IsImprovementStdDev: Marked as improvement because 74.51418040720695 (T) = (0 -58199.11808562548) / Math.Sqrt((4626959.855632644 / (299)) + (135989.49894464496 / (33))) is greater than 1.9671786747533526 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (33) - 2, .975) and 0.15198661952989345 = (68629.95257617526 - 58199.11808562548) / 68629.95257617526 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```#### System.Collections.ContainsFalse&lt;Int32&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 61.606944701443574 < 68.78396447311995.
IsChangePoint: Marked as a change because one of 7/9/2022 5:50:00 AM, 7/27/2022 9:27:06 AM, 8/17/2022 10:14:53 AM, 8/25/2022 6:55:57 AM falls between 8/16/2022 2:19:13 PM and 8/25/2022 6:55:57 AM.
IsImprovementStdDev: Marked as improvement because 62.001135712958245 (T) = (0 -61446.00774220529) / Math.Sqrt((5656578.24372516 / (299)) + (169226.95927961366 / (33))) is greater than 1.9671786747533526 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (33) - 2, .975) and 0.1352996697011809 = (71060.46521454556 - 61446.00774220529) / 71060.46521454556 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```#### System.Collections.ContainsFalse&lt;Int32&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 53.2442087585034 < 64.2150628165064.
IsChangePoint: Marked as a change because one of 7/9/2022 5:50:00 AM, 7/27/2022 9:27:06 AM, 8/17/2022 10:14:53 AM, 8/25/2022 6:55:57 AM falls between 8/16/2022 2:19:13 PM and 8/25/2022 6:55:57 AM.
IsImprovementStdDev: Marked as improvement because 59.27652881784904 (T) = (0 -53743.542896733736) / Math.Sqrt((4281492.135780292 / (299)) + (993210.5272234525 / (33))) is greater than 1.9671786747533526 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (33) - 2, .975) and 0.18860801180496362 = (66236.22574372187 - 53743.542896733736) / 66236.22574372187 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>




Architecture	arm64
OS	ubuntu 20.04
Baseline	96d1c8e3ba4bc94afdcf15ee2896a3bc984820e7
Compare	6521c2b7c01660873fa978c9e73038a1d75e7962
Diff	Diff

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector
ICollection - Duration of single invocation	44.63 μs	34.73 μs	0.78	0.01	False
Span - Duration of single invocation	40.86 μs	30.99 μs	0.76	0.01	False
ImmutableArray - Duration of single invocation	46.34 μs	35.19 μs	0.76	0.01	False
Array - Duration of single invocation	45.34 μs	34.82 μs	0.77	0.01	False
Queue - Duration of single invocation	45.63 μs	34.28 μs	0.75	0.01	False
List - Duration of single invocation	43.21 μs	33.93 μs	0.79	0.01	False
Stack - Duration of single invocation	53.14 μs	34.46 μs	0.65	0.00	False

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio	Baseline ETL	Compare ETL
IndexOfShort - Duration of single invocation	16.42 ns	10.65 ns	0.65	0.20	False
IndexOfChar - Duration of single invocation	14.17 ns	11.22 ns	0.79	0.18	False

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector
IndexOfString - Duration of single invocation	71.01 ns	61.49 ns	0.87	0.01	False
IndexOfString - Duration of single invocation	18.71 ns	14.50 ns	0.78	0.02	False
IndexOfString - Duration of single invocation	18.08 ns	12.15 ns	0.67	0.01	False
IndexOfString - Duration of single invocation	14.52 ns	12.60 ns	0.87	0.02	False
IndexOfString - Duration of single invocation	70.96 ns	61.47 ns	0.87	0.01	False
IndexOfString - Duration of single invocation	32.91 ns	27.50 ns	0.84	0.03	False

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector
List - Duration of single invocation	68.99 μs	57.39 μs	0.83	0.01	False
Array - Duration of single invocation	70.37 μs	58.24 μs	0.83	0.01	False
Stack - Duration of single invocation	102.49 μs	56.51 μs	0.55	0.00	False
ImmutableArray - Duration of single invocation	70.36 μs	60.38 μs	0.86	0.01	False
ICollection - Duration of single invocation	69.59 μs	58.03 μs	0.83	0.01	False
Queue - Duration of single invocation	72.43 μs	61.61 μs	0.85	0.01	False
Span - Duration of single invocation	67.68 μs	53.24 μs	0.79	0.02	False

[Perf] Linux/arm64: 29 Improvements on 8/17/2022 3:53:31 PM #8019

Description

Run Information

Improvements in System.Tests.Perf_String

Repro

Payloads

Histogram

System.Tests.Perf_String.Replace_Char(text: "This is a very nice sentence", oldChar: 'z', newChar: 'y')

Description of detection logic

Docs

Improvements in System.Collections.ContainsTrue<Int32>

Repro

Payloads

Histogram

System.Collections.ContainsTrue<Int32>.ICollection(Size: 512)

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.Tests.Perf_Array

Repro

Payloads

Histogram

System.Tests.Perf_Array.IndexOfShort

Description of detection logic

Description of detection logic

Docs

Run Information

Improvements in System.Memory.ReadOnlySpan

Repro

Payloads

Histogram

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.ContainsFalse<Int32>

Repro

Payloads

Histogram

System.Collections.ContainsFalse<Int32>.List(Size: 512)

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

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