[Perf] Windows/x64: 9 Regressions on 12/25/2022 7:48:20 PM

### Run Information

Architecture | x64
-- | --
OS | Windows 10.0.19042
Baseline | [8355deb78ce4e0c14689ce5eac9ea9fc480faeb0](https://github.com/dotnet/runtime/commit/8355deb78ce4e0c14689ce5eac9ea9fc480faeb0)
Compare | [bd6709248295deefa1956da3aeb9b0e086fbaca5](https://github.com/dotnet/runtime/commit/bd6709248295deefa1956da3aeb9b0e086fbaca5)
Diff | [Diff](https://github.com/dotnet/runtime/compare/8355deb78ce4e0c14689ce5eac9ea9fc480faeb0...bd6709248295deefa1956da3aeb9b0e086fbaca5)


### 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
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[IsPrefix_FirstHalf - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_Windows 10.0.19042/amd/System.Globalization.Tests.StringSearch.IsPrefix_FirstHalf(Options%3a%20(pl-PL%2c%20None%2c%20False)).html>) | 6.70 μs | 7.21 μs | 1.08 | 0.07 | False | | |
[IsPrefix_FirstHalf - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_Windows 10.0.19042/amd/System.Globalization.Tests.StringSearch.IsPrefix_FirstHalf(Options%3a%20(en-US%2c%20None%2c%20True)).html>) | 3.71 μs | 4.50 μs | 1.21 | 0.07 | False | | |
[IsPrefix_FirstHalf - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_Windows 10.0.19042/amd/System.Globalization.Tests.StringSearch.IsPrefix_FirstHalf(Options%3a%20(en-US%2c%20IgnoreCase%2c%20True)).html>) | 3.73 μs | 4.54 μs | 1.22 | 0.08 | False | | |
[IsPrefix_FirstHalf - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_Windows 10.0.19042/amd/System.Globalization.Tests.StringSearch.IsPrefix_FirstHalf(Options%3a%20(%2c%20IgnoreCase%2c%20True)).html>) | 3.71 μs | 4.52 μs | 1.22 | 0.11 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/12_27_2022/refs/heads/main_x64_Windows%2010.0.19042/amd_Regression/System.Globalization.Tests.StringSearch_1.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/12_27_2022/refs/heads/main_x64_Windows%2010.0.19042/amd_Regression/System.Globalization.Tests.StringSearch_2.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/12_27_2022/refs/heads/main_x64_Windows%2010.0.19042/amd_Regression/System.Globalization.Tests.StringSearch_3.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/12_27_2022/refs/heads/main_x64_Windows%2010.0.19042/amd_Regression/System.Globalization.Tests.StringSearch_4.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/12_27_2022/refs/heads/main_x64_Windows%2010.0.19042/amd_Regression/System.Globalization.Tests.StringSearch.html>)

### Repro

```cmd
git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Globalization.Tests.StringSearch*'
```
<details>

### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-35c531d1-e613-47b1-9c74-c26a0641664100a40f98d9d47b88d/199e0a90-7ed8-42aa-af33-4d3a0efef84e.zip?sv=2021-08-06&se=2023-01-22T19%3A59%3A37Z&sr=c&sp=rl&sig=E7%2Bbm4LlG56EVmEQCoLYIYny6mlkfRMbwX3VPoY9Tfw%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-41cef652-5c5b-4e51-8d3e-c3f8090f8f2cbc9dc0f5e634210af/5418d484-a9d3-4597-ae75-078aaec794be.zip?sv=2021-08-06&se=2023-01-25T00%3A56%3A58Z&sr=c&sp=rl&sig=xtopbFOUWEGmZ3xzFO3Qgf9H5puNUedVnch3IdTisLU%3D>)
### Histogram

#### System.Globalization.Tests.StringSearch.IsPrefix_FirstHalf(Options: (pl-PL, None, 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 7.2113108077099595 > 7.169088031841694.
IsChangePoint: Marked as a change because one of 12/23/2022 9:40:21 PM, 12/26/2022 8:24:36 PM falls between 12/17/2022 10:44:50 PM and 12/26/2022 8:24:36 PM.
IsRegressionStdDev: Marked as regression because -3.820433181418042 (T) = (0 -7354.518873031248) / Math.Sqrt((8613.759996065355 / (47)) + (52690.940800709315 / (3))) is less than -2.010634757623041 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (47) + (3) - 2, .025) and -0.07434717374211293 = (6845.570084588534 - 7354.518873031248) / 6845.570084588534 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.

```#### System.Globalization.Tests.StringSearch.IsPrefix_FirstHalf(Options: (en-US, None, True))

```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 4.496179652149322 > 3.8901280101051294.
IsChangePoint: Marked as a change because one of 11/1/2022 6:58:35 AM, 11/1/2022 4:32:17 PM, 12/23/2022 9:40:21 PM, 12/26/2022 8:24:36 PM falls between 12/17/2022 10:44:50 PM and 12/26/2022 8:24:36 PM.
IsRegressionStdDev: Marked as regression because -22.59696461322638 (T) = (0 -4569.610223041637) / Math.Sqrt((3435.3182118894956 / (47)) + (4054.05945064536 / (3))) is less than -2.010634757623041 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (47) + (3) - 2, .025) and -0.22946078554309068 = (3716.759637049424 - 4569.610223041637) / 3716.759637049424 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.

```#### System.Globalization.Tests.StringSearch.IsPrefix_FirstHalf(Options: (en-US, IgnoreCase, True))

```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 4.541652772583729 > 3.902149216877937.
IsChangePoint: Marked as a change because one of 11/1/2022 6:58:35 AM, 11/1/2022 4:32:17 PM, 11/18/2022 1:00:00 AM, 11/18/2022 3:21:53 PM, 12/23/2022 9:40:21 PM, 12/26/2022 8:24:36 PM falls between 12/17/2022 10:44:50 PM and 12/26/2022 8:24:36 PM.
IsRegressionStdDev: Marked as regression because -74.30572370416776 (T) = (0 -4527.918905270303) / Math.Sqrt((2838.6943547020524 / (47)) + (164.77439704489302 / (3))) is less than -2.010634757623041 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (47) + (3) - 2, .025) and -0.21393161587794024 = (3729.962088511567 - 4527.918905270303) / 3729.962088511567 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.

```#### System.Globalization.Tests.StringSearch.IsPrefix_FirstHalf(Options: (, IgnoreCase, True))

```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 4.5240537595785435 > 3.902585473656288.
IsChangePoint: Marked as a change because one of 11/1/2022 6:58:35 AM, 11/1/2022 4:32:17 PM, 11/17/2022 7:01:39 PM, 11/18/2022 3:21:53 PM, 12/23/2022 9:40:21 PM, 12/26/2022 8:24:36 PM falls between 12/17/2022 10:44:50 PM and 12/26/2022 8:24:36 PM.
IsRegressionStdDev: Marked as regression because -14.160563972057991 (T) = (0 -4563.96731122616) / Math.Sqrt((7674.012509234451 / (47)) + (9413.873970413792 / (3))) is less than -2.010634757623041 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (47) + (3) - 2, .025) and -0.21694350532787737 = (3750.352659137208 - 4563.96731122616) / 3750.352659137208 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 | Windows 10.0.19042
Baseline | [8355deb78ce4e0c14689ce5eac9ea9fc480faeb0](https://github.com/dotnet/runtime/commit/8355deb78ce4e0c14689ce5eac9ea9fc480faeb0)
Compare | [bd6709248295deefa1956da3aeb9b0e086fbaca5](https://github.com/dotnet/runtime/commit/bd6709248295deefa1956da3aeb9b0e086fbaca5)
Diff | [Diff](https://github.com/dotnet/runtime/compare/8355deb78ce4e0c14689ce5eac9ea9fc480faeb0...bd6709248295deefa1956da3aeb9b0e086fbaca5)


### Regressions 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
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[ImmutableArray - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_Windows 10.0.19042/amd/System.Collections.ContainsFalse(Int32).ImmutableArray(Size%3a%20512).html>) | 18.14 μs | 19.07 μs | 1.05 | 0.03 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/12_27_2022/refs/heads/main_x64_Windows%2010.0.19042/amd_Regression/System.Collections.ContainsFalse(Int32)_1.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/12_27_2022/refs/heads/main_x64_Windows%2010.0.19042/amd_Regression/System.Collections.ContainsFalse(Int32).html>)

### Repro

```cmd
git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Collections.ContainsFalse&lt;Int32&gt;*'
```
<details>

### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-35c531d1-e613-47b1-9c74-c26a0641664100a40f98d9d47b88d/199e0a90-7ed8-42aa-af33-4d3a0efef84e.zip?sv=2021-08-06&se=2023-01-22T19%3A59%3A37Z&sr=c&sp=rl&sig=E7%2Bbm4LlG56EVmEQCoLYIYny6mlkfRMbwX3VPoY9Tfw%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-41cef652-5c5b-4e51-8d3e-c3f8090f8f2cbc9dc0f5e634210af/5418d484-a9d3-4597-ae75-078aaec794be.zip?sv=2021-08-06&se=2023-01-25T00%3A56%3A58Z&sr=c&sp=rl&sig=xtopbFOUWEGmZ3xzFO3Qgf9H5puNUedVnch3IdTisLU%3D>)
### Histogram

#### System.Collections.ContainsFalse&lt;Int32&gt;.ImmutableArray(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 19.066574632352946 > 18.87276251657825.
IsChangePoint: Marked as a change because one of 10/11/2022 8:42:28 PM, 10/17/2022 3:19:47 PM, 12/23/2022 9:40:21 PM, 12/26/2022 8:24:36 PM falls between 12/17/2022 10:44:50 PM and 12/26/2022 8:24:36 PM.
IsRegressionStdDev: Marked as regression because -4.019249990180762 (T) = (0 -19912.8004589704) / Math.Sqrt((35158.048807095605 / (47)) + (604663.5986493295 / (3))) is less than -2.010634757623041 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (47) + (3) - 2, .025) and -0.09984969009208314 = (18105.019838941113 - 19912.8004589704) / 18105.019838941113 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 | Windows 10.0.19042
Baseline | [8355deb78ce4e0c14689ce5eac9ea9fc480faeb0](https://github.com/dotnet/runtime/commit/8355deb78ce4e0c14689ce5eac9ea9fc480faeb0)
Compare | [bd6709248295deefa1956da3aeb9b0e086fbaca5](https://github.com/dotnet/runtime/commit/bd6709248295deefa1956da3aeb9b0e086fbaca5)
Diff | [Diff](https://github.com/dotnet/runtime/compare/8355deb78ce4e0c14689ce5eac9ea9fc480faeb0...bd6709248295deefa1956da3aeb9b0e086fbaca5)


### Regressions in System.Text.Json.Reader.Tests.Perf_Base64

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio | Baseline ETL | Compare ETL
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[ReadBase64EncodedByteArray_NoEscaping - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_Windows 10.0.19042/amd/System.Text.Json.Reader.Tests.Perf_Base64.ReadBase64EncodedByteArray_NoEscaping(NumberOfBytes%3a%20100).html>) | 94.81 ns | 129.78 ns | 1.37 | 0.15 | False | | |
[ReadBase64EncodedByteArray_HeavyEscaping - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_Windows 10.0.19042/amd/System.Text.Json.Reader.Tests.Perf_Base64.ReadBase64EncodedByteArray_HeavyEscaping(NumberOfBytes%3a%20100).html>) | 94.44 ns | 128.90 ns | 1.36 | 0.14 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/12_27_2022/refs/heads/main_x64_Windows%2010.0.19042/amd_Regression/System.Text.Json.Reader.Tests.Perf_Base64_1.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/12_27_2022/refs/heads/main_x64_Windows%2010.0.19042/amd_Regression/System.Text.Json.Reader.Tests.Perf_Base64_2.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/12_27_2022/refs/heads/main_x64_Windows%2010.0.19042/amd_Regression/System.Text.Json.Reader.Tests.Perf_Base64.html>)

### Repro

```cmd
git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Text.Json.Reader.Tests.Perf_Base64*'
```
<details>

### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-35c531d1-e613-47b1-9c74-c26a0641664100a40f98d9d47b88d/199e0a90-7ed8-42aa-af33-4d3a0efef84e.zip?sv=2021-08-06&se=2023-01-22T19%3A59%3A37Z&sr=c&sp=rl&sig=E7%2Bbm4LlG56EVmEQCoLYIYny6mlkfRMbwX3VPoY9Tfw%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-41cef652-5c5b-4e51-8d3e-c3f8090f8f2cbc9dc0f5e634210af/5418d484-a9d3-4597-ae75-078aaec794be.zip?sv=2021-08-06&se=2023-01-25T00%3A56%3A58Z&sr=c&sp=rl&sig=xtopbFOUWEGmZ3xzFO3Qgf9H5puNUedVnch3IdTisLU%3D>)
### Histogram

#### System.Text.Json.Reader.Tests.Perf_Base64.ReadBase64EncodedByteArray_NoEscaping(NumberOfBytes: 100)

```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 129.78486574630764 > 99.44180681786246.
IsChangePoint: Marked as a change because one of 10/11/2022 8:42:28 PM, 10/14/2022 9:06:25 AM, 11/22/2022 2:20:42 AM, 12/23/2022 9:40:21 PM, 12/26/2022 8:24:36 PM falls between 12/17/2022 10:44:50 PM and 12/26/2022 8:24:36 PM.
IsRegressionStdDev: Marked as regression because -25.55028063016023 (T) = (0 -129.93224427691712) / Math.Sqrt((53.63251079594049 / (47)) + (0.08700826337928207 / (3))) is less than -2.010634757623041 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (47) + (3) - 2, .025) and -0.27018474884920257 = (102.29397290011296 - 129.93224427691712) / 102.29397290011296 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.

```#### System.Text.Json.Reader.Tests.Perf_Base64.ReadBase64EncodedByteArray_HeavyEscaping(NumberOfBytes: 100)

```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 128.9025521921711 > 99.19288937337053.
IsChangePoint: Marked as a change because one of 11/2/2022 9:35:40 AM, 11/10/2022 9:13:35 AM, 12/6/2022 2:12:43 AM, 12/17/2022 10:44:50 PM, 12/23/2022 9:40:21 PM, 12/26/2022 8:24:36 PM falls between 12/17/2022 10:44:50 PM and 12/26/2022 8:24:36 PM.
IsRegressionStdDev: Marked as regression because -28.010330174427953 (T) = (0 -128.95267610928155) / Math.Sqrt((42.78397963843383 / (47)) + (0.0050094813851160784 / (3))) is less than -2.010634757623041 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (47) + (3) - 2, .025) and -0.2617227141621575 = (102.20365747708055 - 128.95267610928155) / 102.20365747708055 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 | Windows 10.0.19042
Baseline | [8355deb78ce4e0c14689ce5eac9ea9fc480faeb0](https://github.com/dotnet/runtime/commit/8355deb78ce4e0c14689ce5eac9ea9fc480faeb0)
Compare | [bd6709248295deefa1956da3aeb9b0e086fbaca5](https://github.com/dotnet/runtime/commit/bd6709248295deefa1956da3aeb9b0e086fbaca5)
Diff | [Diff](https://github.com/dotnet/runtime/compare/8355deb78ce4e0c14689ce5eac9ea9fc480faeb0...bd6709248295deefa1956da3aeb9b0e086fbaca5)


### Regressions in System.Diagnostics.Tracing.Perf_EventListener

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio | Baseline ETL | Compare ETL
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[WriteEvent_IntParams - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_Windows 10.0.19042/amd/System.Diagnostics.Tracing.Perf_EventListener.WriteEvent_IntParams.html>) | 68.70 ns | 73.60 ns | 1.07 | 0.01 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/12_27_2022/refs/heads/main_x64_Windows%2010.0.19042/amd_Regression/System.Diagnostics.Tracing.Perf_EventListener_1.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/12_27_2022/refs/heads/main_x64_Windows%2010.0.19042/amd_Regression/System.Diagnostics.Tracing.Perf_EventListener.html>)

### Repro

```cmd
git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Diagnostics.Tracing.Perf_EventListener*'
```
<details>

### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-35c531d1-e613-47b1-9c74-c26a0641664100a40f98d9d47b88d/199e0a90-7ed8-42aa-af33-4d3a0efef84e.zip?sv=2021-08-06&se=2023-01-22T19%3A59%3A37Z&sr=c&sp=rl&sig=E7%2Bbm4LlG56EVmEQCoLYIYny6mlkfRMbwX3VPoY9Tfw%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-41cef652-5c5b-4e51-8d3e-c3f8090f8f2cbc9dc0f5e634210af/5418d484-a9d3-4597-ae75-078aaec794be.zip?sv=2021-08-06&se=2023-01-25T00%3A56%3A58Z&sr=c&sp=rl&sig=xtopbFOUWEGmZ3xzFO3Qgf9H5puNUedVnch3IdTisLU%3D>)
### Histogram

#### System.Diagnostics.Tracing.Perf_EventListener.WriteEvent_IntParams

```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 73.5963348983555 > 72.48026579767752.
IsChangePoint: Marked as a change because one of 11/11/2022 5:53:56 PM, 11/18/2022 7:31:41 AM, 12/23/2022 9:40:21 PM, 12/26/2022 8:24:36 PM falls between 12/17/2022 10:44:50 PM and 12/26/2022 8:24:36 PM.
IsRegressionStdDev: Marked as regression because -59.66874064015645 (T) = (0 -73.6334363289504) / Math.Sqrt((0.1409088059576603 / (47)) + (0.006967182574554933 / (3))) is less than -2.010634757623041 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (47) + (3) - 2, .025) and -0.062821219343263 = (69.28111237226696 - 73.6334363289504) / 69.28111237226696 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 | Windows 10.0.19042
Baseline | [8355deb78ce4e0c14689ce5eac9ea9fc480faeb0](https://github.com/dotnet/runtime/commit/8355deb78ce4e0c14689ce5eac9ea9fc480faeb0)
Compare | [bd6709248295deefa1956da3aeb9b0e086fbaca5](https://github.com/dotnet/runtime/commit/bd6709248295deefa1956da3aeb9b0e086fbaca5)
Diff | [Diff](https://github.com/dotnet/runtime/compare/8355deb78ce4e0c14689ce5eac9ea9fc480faeb0...bd6709248295deefa1956da3aeb9b0e086fbaca5)


### Regressions in System.Collections.CreateAddAndRemove&lt;String&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_x64_Windows 10.0.19042/amd/System.Collections.CreateAddAndRemove(String).List(Size%3a%20512).html>) | 40.70 μs | 45.35 μs | 1.11 | 0.06 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/12_27_2022/refs/heads/main_x64_Windows%2010.0.19042/amd_Regression/System.Collections.CreateAddAndRemove(String)_1.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/12_27_2022/refs/heads/main_x64_Windows%2010.0.19042/amd_Regression/System.Collections.CreateAddAndRemove(String).html>)

### Repro

```cmd
git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Collections.CreateAddAndRemove&lt;String&gt;*'
```
<details>

### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-35c531d1-e613-47b1-9c74-c26a0641664100a40f98d9d47b88d/199e0a90-7ed8-42aa-af33-4d3a0efef84e.zip?sv=2021-08-06&se=2023-01-22T19%3A59%3A37Z&sr=c&sp=rl&sig=E7%2Bbm4LlG56EVmEQCoLYIYny6mlkfRMbwX3VPoY9Tfw%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-41cef652-5c5b-4e51-8d3e-c3f8090f8f2cbc9dc0f5e634210af/5418d484-a9d3-4597-ae75-078aaec794be.zip?sv=2021-08-06&se=2023-01-25T00%3A56%3A58Z&sr=c&sp=rl&sig=xtopbFOUWEGmZ3xzFO3Qgf9H5puNUedVnch3IdTisLU%3D>)
### Histogram

#### System.Collections.CreateAddAndRemove&lt;String&gt;.List(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 45.352141861761424 > 42.71735537862728.
IsChangePoint: Marked as a change because one of 10/27/2022 8:00:27 PM, 11/10/2022 12:29:27 AM, 12/3/2022 7:24:45 AM, 12/6/2022 2:12:43 AM, 12/23/2022 9:40:21 PM, 12/26/2022 8:24:36 PM falls between 12/17/2022 10:44:50 PM and 12/26/2022 8:24:36 PM.
IsRegressionStdDev: Marked as regression because -41.5431540063143 (T) = (0 -45477.21757492219) / Math.Sqrt((27284.09967984074 / (47)) + (38163.613939340685 / (3))) is less than -2.010634757623041 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (47) + (3) - 2, .025) and -0.11776309320080697 = (40685.91801925972 - 45477.21757492219) / 40685.91801925972 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>




Architecture	x64
OS	Windows 10.0.19042
Baseline	8355deb78ce4e0c14689ce5eac9ea9fc480faeb0
Compare	bd6709248295deefa1956da3aeb9b0e086fbaca5
Diff	Diff

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector
IsPrefix_FirstHalf - Duration of single invocation	6.70 μs	7.21 μs	1.08	0.07	False
IsPrefix_FirstHalf - Duration of single invocation	3.71 μs	4.50 μs	1.21	0.07	False
IsPrefix_FirstHalf - Duration of single invocation	3.73 μs	4.54 μs	1.22	0.08	False
IsPrefix_FirstHalf - Duration of single invocation	3.71 μs	4.52 μs	1.22	0.11	False

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio	Baseline ETL	Compare ETL
ReadBase64EncodedByteArray_NoEscaping - Duration of single invocation	94.81 ns	129.78 ns	1.37	0.15	False
ReadBase64EncodedByteArray_HeavyEscaping - Duration of single invocation	94.44 ns	128.90 ns	1.36	0.14	False

[Perf] Windows/x64: 9 Regressions on 12/25/2022 7:48:20 PM #11132

Description

Run Information

Regressions in System.Globalization.Tests.StringSearch

Repro

Payloads

Histogram

System.Globalization.Tests.StringSearch.IsPrefix_FirstHalf(Options: (pl-PL, None, False))

Description of detection logic

Description of detection logic

Description of detection logic

Description of detection logic

Docs

Regressions in System.Collections.ContainsFalse<Int32>

Repro

Payloads

Histogram

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

Description of detection logic

Docs

Run Information

Regressions in System.Text.Json.Reader.Tests.Perf_Base64

Repro

Payloads

Histogram

System.Text.Json.Reader.Tests.Perf_Base64.ReadBase64EncodedByteArray_NoEscaping(NumberOfBytes: 100)

Description of detection logic

Description of detection logic

Docs

Run Information

Regressions in System.Diagnostics.Tracing.Perf_EventListener

Repro

Payloads

Histogram

System.Diagnostics.Tracing.Perf_EventListener.WriteEvent_IntParams

Description of detection logic

Docs

Run Information

Regressions in System.Collections.CreateAddAndRemove<String>

Repro

Payloads

Histogram

System.Collections.CreateAddAndRemove<String>.List(Size: 512)

Description of detection logic

Docs

Metadata

Metadata

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