Regressions from simple forward substitution pass

## Status

See [scoreboard](https://github.com/dotnet/runtime/issues/64989#issuecomment-1036516512) (below) for details on all the regressions reported here and in linked issues.

### Run Information

Architecture | x64
-- | --
OS | ubuntu 18.04
Baseline | [50e6f078bcf4aa5bca1e7e110b9a6cb846390b82](https://github.com/dotnet/runtime/commit/50e6f078bcf4aa5bca1e7e110b9a6cb846390b82)
Compare | [607dccee09d06ef3f0d4c015da39fcc81117b4eb](https://github.com/dotnet/runtime/commit/607dccee09d06ef3f0d4c015da39fcc81117b4eb)
Diff | [Diff](https://github.com/dotnet/runtime/compare/50e6f078bcf4aa5bca1e7e110b9a6cb846390b82...607dccee09d06ef3f0d4c015da39fcc81117b4eb)


### 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
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[IndexOfValue - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 18.04/System.Memory.Span(Byte).IndexOfValue(Size%3a%20512).html>) | 7.48 ns | 11.09 ns | 1.48 | 0.60 | False | | |

![graph](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/02_07_2022/refs/heads/main_x64_ubuntu%2018.04_Regression/System.Memory.Span(Byte)_1.png>)
[Test Report](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/02_07_2022/refs/heads/main_x64_ubuntu%2018.04_Regression/System.Memory.Span(Byte).html>)

### Repro

```cmd
git clone https://github.com/dotnet/performance.git
python3 .\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-730e97d4-0939-464b-9108-944d0b082f543f2386db0ef4f35a3/b93b492d-d70a-4ca8-9a1a-8b2676bb1ad8.zip?sv=2019-07-07&se=2022-03-05T20%3A48%3A25Z&sr=c&sp=rl&sig=%2Buax3tT5I0X3VLGwWS5skztMIVUDvGd5pAjdlnpbfpE%3D>)
[Compare](<https://helixdi8s23ayyeko0k025g8.blob.core.windows.net/helix-job-10b647fc-e56c-44ff-95db-f51fe54ac151fde18e1e89c481aa8/b10f56f8-e44f-4364-878f-23cd008931d7.zip?sv=2019-07-07&se=2022-03-06T10%3A19%3A32Z&sr=c&sp=rl&sig=bxkvCQ42E4ycRzxbDXsBGGOJh0fZC2qnICuSRWeU%2BJs%3D>)
### Histogram

#### System.Memory.Span&lt;Byte&gt;.IndexOfValue(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 11.085147614122393 > 7.862210160508238.
IsChangePoint: Marked as a change because one of 2/3/2022 10:14:29 PM, 2/8/2022 12:37:33 AM falls between 1/30/2022 3:20:30 AM and 2/8/2022 12:37:33 AM.
IsRegressionStdDev: Marked as regression because -17.00911942763199 (T) = (0 -11.293185216470434) / Math.Sqrt((0.4856141221968675 / (55)) + (1.0088142348260798 / (23))) is less than -1.9916726096441384 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (55) + (23) - 2, .025) and -0.5284132866530846 = (7.388829523459732 - 11.293185216470434) / 7.388829523459732 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 | x64
-- | --
OS | ubuntu 18.04
Baseline | [50e6f078bcf4aa5bca1e7e110b9a6cb846390b82](https://github.com/dotnet/runtime/commit/50e6f078bcf4aa5bca1e7e110b9a6cb846390b82)
Compare | [607dccee09d06ef3f0d4c015da39fcc81117b4eb](https://github.com/dotnet/runtime/commit/607dccee09d06ef3f0d4c015da39fcc81117b4eb)
Diff | [Diff](https://github.com/dotnet/runtime/compare/50e6f078bcf4aa5bca1e7e110b9a6cb846390b82...607dccee09d06ef3f0d4c015da39fcc81117b4eb)


### Regressions in System.Memory.Span&lt;Int32&gt;

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio | Baseline ETL | Compare ETL
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[StartsWith - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 18.04/System.Memory.Span(Int32).StartsWith(Size%3a%20512).html>) | 16.17 ns | 23.16 ns | 1.43 | 0.07 | False | | |

![graph](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/02_07_2022/refs/heads/main_x64_ubuntu%2018.04_Regression/System.Memory.Span(Int32)_1.png>)
[Test Report](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/02_07_2022/refs/heads/main_x64_ubuntu%2018.04_Regression/System.Memory.Span(Int32).html>)

### Repro

```cmd
git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net6.0 --filter 'System.Memory.Span&lt;Int32&gt;*'
```
<details>

### Payloads

[Baseline](<https://helixdi8s23ayyeko0k025g8.blob.core.windows.net/helix-job-730e97d4-0939-464b-9108-944d0b082f543f2386db0ef4f35a3/b93b492d-d70a-4ca8-9a1a-8b2676bb1ad8.zip?sv=2019-07-07&se=2022-03-05T20%3A48%3A25Z&sr=c&sp=rl&sig=%2Buax3tT5I0X3VLGwWS5skztMIVUDvGd5pAjdlnpbfpE%3D>)
[Compare](<https://helixdi8s23ayyeko0k025g8.blob.core.windows.net/helix-job-10b647fc-e56c-44ff-95db-f51fe54ac151fde18e1e89c481aa8/b10f56f8-e44f-4364-878f-23cd008931d7.zip?sv=2019-07-07&se=2022-03-06T10%3A19%3A32Z&sr=c&sp=rl&sig=bxkvCQ42E4ycRzxbDXsBGGOJh0fZC2qnICuSRWeU%2BJs%3D>)
### Histogram

#### System.Memory.Span&lt;Int32&gt;.StartsWith(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 23.164866167123595 > 16.835331146004577.
IsChangePoint: Marked as a change because one of 1/25/2022 4:50:09 PM, 2/3/2022 10:14:29 PM, 2/8/2022 12:37:33 AM falls between 1/30/2022 3:20:30 AM and 2/8/2022 12:37:33 AM.
IsRegressionStdDev: Marked as regression because -12.72084176967564 (T) = (0 -22.00645069365951) / Math.Sqrt((0.8896820664330909 / (55)) + (3.9572562379688723 / (23))) is less than -1.9916726096441384 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (55) + (23) - 2, .025) and -0.3347400926804468 = (16.487442622230517 - 22.00645069365951) / 16.487442622230517 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 | x64
-- | --
OS | ubuntu 18.04
Baseline | [50e6f078bcf4aa5bca1e7e110b9a6cb846390b82](https://github.com/dotnet/runtime/commit/50e6f078bcf4aa5bca1e7e110b9a6cb846390b82)
Compare | [607dccee09d06ef3f0d4c015da39fcc81117b4eb](https://github.com/dotnet/runtime/commit/607dccee09d06ef3f0d4c015da39fcc81117b4eb)
Diff | [Diff](https://github.com/dotnet/runtime/compare/50e6f078bcf4aa5bca1e7e110b9a6cb846390b82...607dccee09d06ef3f0d4c015da39fcc81117b4eb)


### Regressions in System.Buffers.Text.Tests.Utf8ParserTests

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio | Baseline ETL | Compare ETL
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[TryParseDateTimeOffset - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 18.04/System.Buffers.Text.Tests.Utf8ParserTests.TryParseDateTimeOffset(value%3a%2012%2f30%2f2017%203%3a45%3a22%20AM%20-08%3a00).html>) | 9.34 ns | 10.77 ns | 1.15 | 0.03 | False | | |

![graph](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/02_07_2022/refs/heads/main_x64_ubuntu%2018.04_Regression/System.Buffers.Text.Tests.Utf8ParserTests_1.png>)
[Test Report](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/02_07_2022/refs/heads/main_x64_ubuntu%2018.04_Regression/System.Buffers.Text.Tests.Utf8ParserTests.html>)

### Repro

```cmd
git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net6.0 --filter 'System.Buffers.Text.Tests.Utf8ParserTests*'
```
<details>

### Payloads

[Baseline](<https://helixdi8s23ayyeko0k025g8.blob.core.windows.net/helix-job-730e97d4-0939-464b-9108-944d0b082f543f2386db0ef4f35a3/b93b492d-d70a-4ca8-9a1a-8b2676bb1ad8.zip?sv=2019-07-07&se=2022-03-05T20%3A48%3A25Z&sr=c&sp=rl&sig=%2Buax3tT5I0X3VLGwWS5skztMIVUDvGd5pAjdlnpbfpE%3D>)
[Compare](<https://helixdi8s23ayyeko0k025g8.blob.core.windows.net/helix-job-10b647fc-e56c-44ff-95db-f51fe54ac151fde18e1e89c481aa8/b10f56f8-e44f-4364-878f-23cd008931d7.zip?sv=2019-07-07&se=2022-03-06T10%3A19%3A32Z&sr=c&sp=rl&sig=bxkvCQ42E4ycRzxbDXsBGGOJh0fZC2qnICuSRWeU%2BJs%3D>)
### Histogram

#### System.Buffers.Text.Tests.Utf8ParserTests.TryParseDateTimeOffset(value: 12/30/2017 3:45:22 AM -08:00)

```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 10.771670504772652 > 9.810891348350939.
IsChangePoint: Marked as a change because one of 12/7/2021 2:32:08 PM, 2/3/2022 10:14:29 PM, 2/8/2022 12:37:33 AM falls between 1/30/2022 3:20:30 AM and 2/8/2022 12:37:33 AM.
IsRegressionStdDev: Marked as regression because -81.78263602291406 (T) = (0 -10.784544915500774) / Math.Sqrt((0.018074601767252133 / (55)) + (0.00024223721686166197 / (23))) is less than -1.9916726096441384 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (55) + (23) - 2, .025) and -0.16232696139283564 = (9.278408979326674 - 10.784544915500774) / 9.278408979326674 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 | x64
-- | --
OS | ubuntu 18.04
Baseline | [50e6f078bcf4aa5bca1e7e110b9a6cb846390b82](https://github.com/dotnet/runtime/commit/50e6f078bcf4aa5bca1e7e110b9a6cb846390b82)
Compare | [607dccee09d06ef3f0d4c015da39fcc81117b4eb](https://github.com/dotnet/runtime/commit/607dccee09d06ef3f0d4c015da39fcc81117b4eb)
Diff | [Diff](https://github.com/dotnet/runtime/compare/50e6f078bcf4aa5bca1e7e110b9a6cb846390b82...607dccee09d06ef3f0d4c015da39fcc81117b4eb)


### Regressions in System.Collections.AddGivenSize&lt;String&gt;

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio | Baseline ETL | Compare ETL
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[Dictionary - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 18.04/System.Collections.AddGivenSize(String).Dictionary(Size%3a%20512).html>) | 10.59 μs | 12.27 μs | 1.16 | 0.01 | True | | |

![graph](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/02_07_2022/refs/heads/main_x64_ubuntu%2018.04_Regression/System.Collections.AddGivenSize(String)_1.png>)
[Test Report](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/02_07_2022/refs/heads/main_x64_ubuntu%2018.04_Regression/System.Collections.AddGivenSize(String).html>)

### Repro

```cmd
git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net6.0 --filter 'System.Collections.AddGivenSize&lt;String&gt;*'
```
<details>

### Payloads

[Baseline](<https://helixdi8s23ayyeko0k025g8.blob.core.windows.net/helix-job-730e97d4-0939-464b-9108-944d0b082f543f2386db0ef4f35a3/b93b492d-d70a-4ca8-9a1a-8b2676bb1ad8.zip?sv=2019-07-07&se=2022-03-05T20%3A48%3A25Z&sr=c&sp=rl&sig=%2Buax3tT5I0X3VLGwWS5skztMIVUDvGd5pAjdlnpbfpE%3D>)
[Compare](<https://helixdi8s23ayyeko0k025g8.blob.core.windows.net/helix-job-10b647fc-e56c-44ff-95db-f51fe54ac151fde18e1e89c481aa8/b10f56f8-e44f-4364-878f-23cd008931d7.zip?sv=2019-07-07&se=2022-03-06T10%3A19%3A32Z&sr=c&sp=rl&sig=bxkvCQ42E4ycRzxbDXsBGGOJh0fZC2qnICuSRWeU%2BJs%3D>)
### Histogram

#### System.Collections.AddGivenSize&lt;String&gt;.Dictionary(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 12.268180396685011 > 11.272430324504915.
IsChangePoint: Marked as a change because one of 2/3/2022 10:14:29 PM, 2/8/2022 12:37:33 AM falls between 1/30/2022 3:20:30 AM and 2/8/2022 12:37:33 AM.
IsRegressionStdDev: Marked as regression because -43.86669863337481 (T) = (0 -12037.246022647732) / Math.Sqrt((20169.59953723831 / (55)) + (10148.165516652267 / (23))) is less than -1.9916726096441384 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (55) + (23) - 2, .025) and -0.11555525082824997 = (10790.362927977449 - 12037.246022647732) / 10790.362927977449 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 as 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 | x64
-- | --
OS | ubuntu 18.04
Baseline | [50e6f078bcf4aa5bca1e7e110b9a6cb846390b82](https://github.com/dotnet/runtime/commit/50e6f078bcf4aa5bca1e7e110b9a6cb846390b82)
Compare | [607dccee09d06ef3f0d4c015da39fcc81117b4eb](https://github.com/dotnet/runtime/commit/607dccee09d06ef3f0d4c015da39fcc81117b4eb)
Diff | [Diff](https://github.com/dotnet/runtime/compare/50e6f078bcf4aa5bca1e7e110b9a6cb846390b82...607dccee09d06ef3f0d4c015da39fcc81117b4eb)


### Regressions in System.Globalization.Tests.StringSearch

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio | Baseline ETL | Compare ETL
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[IsSuffix_SecondHalf - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 18.04/System.Globalization.Tests.StringSearch.IsSuffix_SecondHalf(Options%3a%20(en-US%2c%20Ordinal%2c%20False)).html>) | 8.35 ns | 9.97 ns | 1.19 | 0.04 | False | | |

![graph](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/02_07_2022/refs/heads/main_x64_ubuntu%2018.04_Regression/System.Globalization.Tests.StringSearch_1.png>)
[Test Report](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/02_07_2022/refs/heads/main_x64_ubuntu%2018.04_Regression/System.Globalization.Tests.StringSearch.html>)

### Repro

```cmd
git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net6.0 --filter 'System.Globalization.Tests.StringSearch*'
```
<details>

### Payloads

[Baseline](<https://helixdi8s23ayyeko0k025g8.blob.core.windows.net/helix-job-730e97d4-0939-464b-9108-944d0b082f543f2386db0ef4f35a3/b93b492d-d70a-4ca8-9a1a-8b2676bb1ad8.zip?sv=2019-07-07&se=2022-03-05T20%3A48%3A25Z&sr=c&sp=rl&sig=%2Buax3tT5I0X3VLGwWS5skztMIVUDvGd5pAjdlnpbfpE%3D>)
[Compare](<https://helixdi8s23ayyeko0k025g8.blob.core.windows.net/helix-job-10b647fc-e56c-44ff-95db-f51fe54ac151fde18e1e89c481aa8/b10f56f8-e44f-4364-878f-23cd008931d7.zip?sv=2019-07-07&se=2022-03-06T10%3A19%3A32Z&sr=c&sp=rl&sig=bxkvCQ42E4ycRzxbDXsBGGOJh0fZC2qnICuSRWeU%2BJs%3D>)
### Histogram

#### System.Globalization.Tests.StringSearch.IsSuffix_SecondHalf(Options: (en-US, Ordinal, False))

```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 9.967615474099448 > 8.884278925989152.
IsChangePoint: Marked as a change because one of 1/25/2022 4:50:09 PM, 2/3/2022 10:14:29 PM, 2/8/2022 12:37:33 AM falls between 1/30/2022 3:20:30 AM and 2/8/2022 12:37:33 AM.
IsRegressionStdDev: Marked as regression because -23.71682915669581 (T) = (0 -9.794788816757285) / Math.Sqrt((0.038367554435579515 / (55)) + (0.03969470060896875 / (23))) is less than -1.9916726096441384 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (55) + (23) - 2, .025) and -0.13533229012730502 = (8.627244113403128 - 9.794788816757285) / 8.627244113403128 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 | x64
-- | --
OS | ubuntu 18.04
Baseline | [50e6f078bcf4aa5bca1e7e110b9a6cb846390b82](https://github.com/dotnet/runtime/commit/50e6f078bcf4aa5bca1e7e110b9a6cb846390b82)
Compare | [607dccee09d06ef3f0d4c015da39fcc81117b4eb](https://github.com/dotnet/runtime/commit/607dccee09d06ef3f0d4c015da39fcc81117b4eb)
Diff | [Diff](https://github.com/dotnet/runtime/compare/50e6f078bcf4aa5bca1e7e110b9a6cb846390b82...607dccee09d06ef3f0d4c015da39fcc81117b4eb)


### Regressions in System.Text.Json.Tests.Perf_Basic

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio | Baseline ETL | Compare ETL
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[WriteBasicUtf16 - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 18.04/System.Text.Json.Tests.Perf_Basic.WriteBasicUtf16(Formatted%3a%20False%2c%20SkipValidation%3a%20False%2c%20DataSize%3a%20100000).html>) | 1.52 ms | 1.73 ms | 1.14 | 0.07 | False | | |

![graph](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/02_07_2022/refs/heads/main_x64_ubuntu%2018.04_Regression/System.Text.Json.Tests.Perf_Basic_1.png>)
[Test Report](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/02_07_2022/refs/heads/main_x64_ubuntu%2018.04_Regression/System.Text.Json.Tests.Perf_Basic.html>)

### Repro

```cmd
git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net6.0 --filter 'System.Text.Json.Tests.Perf_Basic*'
```
<details>

### Payloads

[Baseline](<https://helixdi8s23ayyeko0k025g8.blob.core.windows.net/helix-job-730e97d4-0939-464b-9108-944d0b082f543f2386db0ef4f35a3/b93b492d-d70a-4ca8-9a1a-8b2676bb1ad8.zip?sv=2019-07-07&se=2022-03-05T20%3A48%3A25Z&sr=c&sp=rl&sig=%2Buax3tT5I0X3VLGwWS5skztMIVUDvGd5pAjdlnpbfpE%3D>)
[Compare](<https://helixdi8s23ayyeko0k025g8.blob.core.windows.net/helix-job-10b647fc-e56c-44ff-95db-f51fe54ac151fde18e1e89c481aa8/b10f56f8-e44f-4364-878f-23cd008931d7.zip?sv=2019-07-07&se=2022-03-06T10%3A19%3A32Z&sr=c&sp=rl&sig=bxkvCQ42E4ycRzxbDXsBGGOJh0fZC2qnICuSRWeU%2BJs%3D>)
### Histogram

#### System.Text.Json.Tests.Perf_Basic.WriteBasicUtf16(Formatted: False, SkipValidation: False, DataSize: 100000)

```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 1.732647520138889 > 1.6872304220372598.
IsChangePoint: Marked as a change because one of 1/21/2022 11:24:10 PM, 2/3/2022 10:14:29 PM, 2/8/2022 12:37:33 AM falls between 1/30/2022 3:20:30 AM and 2/8/2022 12:37:33 AM.
IsRegressionStdDev: Marked as regression because -21.656021748845443 (T) = (0 -1741917.4317416963) / Math.Sqrt((1607416812.114774 / (55)) + (127412484.86469544 / (23))) is less than -1.9916726096441384 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (55) + (23) - 2, .025) and -0.07910199435011984 = (1614228.7206046279 - 1741917.4317416963) / 1614228.7206046279 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 | x64
-- | --
OS | ubuntu 18.04
Baseline | [50e6f078bcf4aa5bca1e7e110b9a6cb846390b82](https://github.com/dotnet/runtime/commit/50e6f078bcf4aa5bca1e7e110b9a6cb846390b82)
Compare | [607dccee09d06ef3f0d4c015da39fcc81117b4eb](https://github.com/dotnet/runtime/commit/607dccee09d06ef3f0d4c015da39fcc81117b4eb)
Diff | [Diff](https://github.com/dotnet/runtime/compare/50e6f078bcf4aa5bca1e7e110b9a6cb846390b82...607dccee09d06ef3f0d4c015da39fcc81117b4eb)


### Regressions in System.Collections.CreateAddAndClear&lt;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.blob.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 18.04/System.Collections.CreateAddAndClear(String).IDictionary(Size%3a%20512).html>) | 16.12 μs | 17.72 μs | 1.10 | 0.00 | True | | |

![graph](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/02_07_2022/refs/heads/main_x64_ubuntu%2018.04_Regression/System.Collections.CreateAddAndClear(String)_1.png>)
[Test Report](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/02_07_2022/refs/heads/main_x64_ubuntu%2018.04_Regression/System.Collections.CreateAddAndClear(String).html>)

### Repro

```cmd
git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net6.0 --filter 'System.Collections.CreateAddAndClear&lt;String&gt;*'
```
<details>

### Payloads

[Baseline](<https://helixdi8s23ayyeko0k025g8.blob.core.windows.net/helix-job-730e97d4-0939-464b-9108-944d0b082f543f2386db0ef4f35a3/b93b492d-d70a-4ca8-9a1a-8b2676bb1ad8.zip?sv=2019-07-07&se=2022-03-05T20%3A48%3A25Z&sr=c&sp=rl&sig=%2Buax3tT5I0X3VLGwWS5skztMIVUDvGd5pAjdlnpbfpE%3D>)
[Compare](<https://helixdi8s23ayyeko0k025g8.blob.core.windows.net/helix-job-10b647fc-e56c-44ff-95db-f51fe54ac151fde18e1e89c481aa8/b10f56f8-e44f-4364-878f-23cd008931d7.zip?sv=2019-07-07&se=2022-03-06T10%3A19%3A32Z&sr=c&sp=rl&sig=bxkvCQ42E4ycRzxbDXsBGGOJh0fZC2qnICuSRWeU%2BJs%3D>)
### Histogram

#### System.Collections.CreateAddAndClear&lt;String&gt;.IDictionary(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 17.715596582581735 > 16.6983248946314.
IsChangePoint: Marked as a change because one of 2/3/2022 10:14:29 PM, 2/8/2022 12:37:33 AM falls between 1/30/2022 3:20:30 AM and 2/8/2022 12:37:33 AM.
IsRegressionStdDev: Marked as regression because -38.871281755258785 (T) = (0 -17407.502138332035) / Math.Sqrt((26497.84614548045 / (55)) + (24881.06091812818 / (23))) is less than -1.9916726096441384 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (55) + (23) - 2, .025) and -0.09684948356417755 = (15870.456611573458 - 17407.502138332035) / 15870.456611573458 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 as 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	x64
OS	ubuntu 18.04
Baseline	50e6f078bcf4aa5bca1e7e110b9a6cb846390b82
Compare	607dccee09d06ef3f0d4c015da39fcc81117b4eb
Diff	Diff

Regressions from simple forward substitution pass #64989

Description

Status

Run Information

Regressions in System.Memory.Span<Byte>

Repro

Payloads

Histogram

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

Description of detection logic

Docs

Regressions in System.Memory.Span<Int32>

Repro

Payloads

Histogram

System.Memory.Span<Int32>.StartsWith(Size: 512)

Description of detection logic

Docs

Run Information

Regressions in System.Buffers.Text.Tests.Utf8ParserTests

Repro

Payloads

Histogram

System.Buffers.Text.Tests.Utf8ParserTests.TryParseDateTimeOffset(value: 12/30/2017 3:45:22 AM -08:00)

Description of detection logic

Docs

Run Information

Regressions in System.Collections.AddGivenSize<String>

Repro

Payloads

Histogram

System.Collections.AddGivenSize<String>.Dictionary(Size: 512)

Description of detection logic

Docs

Run Information

Regressions in System.Globalization.Tests.StringSearch

Repro

Payloads

Histogram

System.Globalization.Tests.StringSearch.IsSuffix_SecondHalf(Options: (en-US, Ordinal, False))

Description of detection logic

Docs

Run Information

Regressions in System.Text.Json.Tests.Perf_Basic

Repro

Payloads

Histogram

System.Text.Json.Tests.Perf_Basic.WriteBasicUtf16(Formatted: False, SkipValidation: False, DataSize: 100000)

Description of detection logic

Docs

Run Information

Regressions in System.Collections.CreateAddAndClear<String>

Repro

Payloads

Histogram

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

Description of detection logic

Docs

Metadata

Metadata

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Development

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