Regressions in System.Net.Tests.Perf_WebUtility

### Run Information

Name | Value
-- | --
Architecture | arm64
OS | Windows 10.0.19041
Queue | SurfaceWindows
Baseline | [7b651743dc951384f6c3d8455c88518022c7c3b9](https://github.com/dotnet/runtime/commit/7b651743dc951384f6c3d8455c88518022c7c3b9)
Compare | [b0b7aaefb88aa8d01b3d64fb40ac2f73a9d98c3e](https://github.com/dotnet/runtime/commit/b0b7aaefb88aa8d01b3d64fb40ac2f73a9d98c3e)
Diff | [Diff](https://github.com/dotnet/runtime/compare/7b651743dc951384f6c3d8455c88518022c7c3b9...b0b7aaefb88aa8d01b3d64fb40ac2f73a9d98c3e)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in System.IO.Tests.Perf_RandomAccess

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio | Baseline ETL | Compare ETL
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[WriteAsync - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_Windows 10.0.19041/System.IO.Tests.Perf_RandomAccess.WriteAsync(fileSize%3a%201048576%2c%20bufferSize%3a%204096%2c%20options%3a%20Asynchronous).html>) | 6.45 ms | 7.42 ms | 1.15 | 0.21 | False | | |

![graph](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/03_30_2023/refs/heads/main_arm64_Windows%2010.0.19041_Regression/System.IO.Tests.Perf_RandomAccess_1.png>)
[Test Report](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/03_30_2023/refs/heads/main_arm64_Windows%2010.0.19041_Regression/System.IO.Tests.Perf_RandomAccess.html>)

### Repro
General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-c33ec5ea-ffa2-4c79-b939-96df8e514c4ce9cf26df1b7439a99/b9f97159-12d2-420f-a929-6d11c9d8bee5.zip?sv=2021-08-06&se=2023-04-20T07%3A26%3A18Z&sr=c&sp=rl&sig=ydoh%2FgNYvoMRvpVGo3yW1R0nBvMIkPL0vwSm%2FDPpD3E%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-2e4b37b7-af0a-4ecb-b10c-353dcf809f42fbe0462f8bc49548d/9e2c5bbb-cad5-43e6-951d-4ecf891e4eaa.zip?sv=2021-08-06&se=2023-04-21T03%3A33%3A47Z&sr=c&sp=rl&sig=8de%2BtBfr%2BWpSaJEnEPMJv4OVBI%2FhmGN7Rd9Poiad4%2Fk%3D>)

```cmd
git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.IO.Tests.Perf_RandomAccess*'
```

<details>


### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-c33ec5ea-ffa2-4c79-b939-96df8e514c4ce9cf26df1b7439a99/b9f97159-12d2-420f-a929-6d11c9d8bee5.zip?sv=2021-08-06&se=2023-04-20T07%3A26%3A18Z&sr=c&sp=rl&sig=ydoh%2FgNYvoMRvpVGo3yW1R0nBvMIkPL0vwSm%2FDPpD3E%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-2e4b37b7-af0a-4ecb-b10c-353dcf809f42fbe0462f8bc49548d/9e2c5bbb-cad5-43e6-951d-4ecf891e4eaa.zip?sv=2021-08-06&se=2023-04-21T03%3A33%3A47Z&sr=c&sp=rl&sig=8de%2BtBfr%2BWpSaJEnEPMJv4OVBI%2FhmGN7Rd9Poiad4%2Fk%3D>)
### Histogram

#### System.IO.Tests.Perf_RandomAccess.WriteAsync(fileSize: 1048576, bufferSize: 4096, options: Asynchronous)

```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 7.41565796875 > 6.887066412815026.
IsChangePoint: Marked as a change because one of 3/7/2023 9:28:02 PM, 3/21/2023 2:53:21 PM, 3/30/2023 4:24:24 AM falls between 3/21/2023 2:53:21 PM and 3/30/2023 4:24:24 AM.
IsRegressionStdDev: Marked as regression because -8.144931698660324 (T) = (0 -6997343.385407349) / Math.Sqrt((10295959596.488184 / (9)) + (64858929139.038864 / (30))) is less than -2.026192463026769 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (9) + (30) - 2, .025) and -0.0717278054356889 = (6529030.3656558795 - 6997343.385407349) / 6529030.3656558795 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

Name | Value
-- | --
Architecture | arm64
OS | Windows 10.0.19041
Queue | SurfaceWindows
Baseline | [7b651743dc951384f6c3d8455c88518022c7c3b9](https://github.com/dotnet/runtime/commit/7b651743dc951384f6c3d8455c88518022c7c3b9)
Compare | [b0b7aaefb88aa8d01b3d64fb40ac2f73a9d98c3e](https://github.com/dotnet/runtime/commit/b0b7aaefb88aa8d01b3d64fb40ac2f73a9d98c3e)
Diff | [Diff](https://github.com/dotnet/runtime/compare/7b651743dc951384f6c3d8455c88518022c7c3b9...b0b7aaefb88aa8d01b3d64fb40ac2f73a9d98c3e)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in PerfLabTests.BlockCopyPerf

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio | Baseline ETL | Compare ETL
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[CallBlockCopy - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_Windows 10.0.19041/PerfLabTests.BlockCopyPerf.CallBlockCopy(numElements%3a%201000).html>) | 26.87 ns | 28.76 ns | 1.07 | 0.02 | False | | |

![graph](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/03_30_2023/refs/heads/main_arm64_Windows%2010.0.19041_Regression/PerfLabTests.BlockCopyPerf_1.png>)
[Test Report](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/03_30_2023/refs/heads/main_arm64_Windows%2010.0.19041_Regression/PerfLabTests.BlockCopyPerf.html>)

### Repro
General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-c33ec5ea-ffa2-4c79-b939-96df8e514c4ce9cf26df1b7439a99/b9f97159-12d2-420f-a929-6d11c9d8bee5.zip?sv=2021-08-06&se=2023-04-20T07%3A26%3A18Z&sr=c&sp=rl&sig=ydoh%2FgNYvoMRvpVGo3yW1R0nBvMIkPL0vwSm%2FDPpD3E%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-2e4b37b7-af0a-4ecb-b10c-353dcf809f42fbe0462f8bc49548d/9e2c5bbb-cad5-43e6-951d-4ecf891e4eaa.zip?sv=2021-08-06&se=2023-04-21T03%3A33%3A47Z&sr=c&sp=rl&sig=8de%2BtBfr%2BWpSaJEnEPMJv4OVBI%2FhmGN7Rd9Poiad4%2Fk%3D>)

```cmd
git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'PerfLabTests.BlockCopyPerf*'
```

<details>


### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-c33ec5ea-ffa2-4c79-b939-96df8e514c4ce9cf26df1b7439a99/b9f97159-12d2-420f-a929-6d11c9d8bee5.zip?sv=2021-08-06&se=2023-04-20T07%3A26%3A18Z&sr=c&sp=rl&sig=ydoh%2FgNYvoMRvpVGo3yW1R0nBvMIkPL0vwSm%2FDPpD3E%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-2e4b37b7-af0a-4ecb-b10c-353dcf809f42fbe0462f8bc49548d/9e2c5bbb-cad5-43e6-951d-4ecf891e4eaa.zip?sv=2021-08-06&se=2023-04-21T03%3A33%3A47Z&sr=c&sp=rl&sig=8de%2BtBfr%2BWpSaJEnEPMJv4OVBI%2FhmGN7Rd9Poiad4%2Fk%3D>)
### Histogram

#### PerfLabTests.BlockCopyPerf.CallBlockCopy(numElements: 1000)

```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 28.759705127676714 > 28.03898220371965.
IsChangePoint: Marked as a change because one of 1/11/2023 1:25:06 PM, 3/21/2023 2:53:21 PM, 3/30/2023 4:24:24 AM falls between 3/21/2023 2:53:21 PM and 3/30/2023 4:24:24 AM.
IsRegressionStdDev: Marked as regression because -14.874272113413571 (T) = (0 -28.464926181910247) / Math.Sqrt((0.09707962595291228 / (9)) + (0.10767118215502557 / (30))) is less than -2.026192463026769 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (9) + (30) - 2, .025) and -0.06684040627705189 = (26.681522385568588 - 28.464926181910247) / 26.681522385568588 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

Name | Value
-- | --
Architecture | arm64
OS | Windows 10.0.19041
Queue | SurfaceWindows
Baseline | [7b651743dc951384f6c3d8455c88518022c7c3b9](https://github.com/dotnet/runtime/commit/7b651743dc951384f6c3d8455c88518022c7c3b9)
Compare | [b0b7aaefb88aa8d01b3d64fb40ac2f73a9d98c3e](https://github.com/dotnet/runtime/commit/b0b7aaefb88aa8d01b3d64fb40ac2f73a9d98c3e)
Diff | [Diff](https://github.com/dotnet/runtime/compare/7b651743dc951384f6c3d8455c88518022c7c3b9...b0b7aaefb88aa8d01b3d64fb40ac2f73a9d98c3e)
Configs | CompilationMode:tiered, RunKind:micro


### Regressions in System.Net.Tests.Perf_WebUtility

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio | Baseline ETL | Compare ETL
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[Decode_NoDecodingRequired - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_Windows 10.0.19041/System.Net.Tests.Perf_WebUtility.Decode_NoDecodingRequired.html>) | 77.86 ns | 85.88 ns | 1.10 | 0.01 | False | | |

![graph](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/03_30_2023/refs/heads/main_arm64_Windows%2010.0.19041_Regression/System.Net.Tests.Perf_WebUtility_1.png>)
[Test Report](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/03_30_2023/refs/heads/main_arm64_Windows%2010.0.19041_Regression/System.Net.Tests.Perf_WebUtility.html>)

### Repro
General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-c33ec5ea-ffa2-4c79-b939-96df8e514c4ce9cf26df1b7439a99/b9f97159-12d2-420f-a929-6d11c9d8bee5.zip?sv=2021-08-06&se=2023-04-20T07%3A26%3A18Z&sr=c&sp=rl&sig=ydoh%2FgNYvoMRvpVGo3yW1R0nBvMIkPL0vwSm%2FDPpD3E%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-2e4b37b7-af0a-4ecb-b10c-353dcf809f42fbe0462f8bc49548d/9e2c5bbb-cad5-43e6-951d-4ecf891e4eaa.zip?sv=2021-08-06&se=2023-04-21T03%3A33%3A47Z&sr=c&sp=rl&sig=8de%2BtBfr%2BWpSaJEnEPMJv4OVBI%2FhmGN7Rd9Poiad4%2Fk%3D>)

```cmd
git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Net.Tests.Perf_WebUtility*'
```

<details>


### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-c33ec5ea-ffa2-4c79-b939-96df8e514c4ce9cf26df1b7439a99/b9f97159-12d2-420f-a929-6d11c9d8bee5.zip?sv=2021-08-06&se=2023-04-20T07%3A26%3A18Z&sr=c&sp=rl&sig=ydoh%2FgNYvoMRvpVGo3yW1R0nBvMIkPL0vwSm%2FDPpD3E%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-2e4b37b7-af0a-4ecb-b10c-353dcf809f42fbe0462f8bc49548d/9e2c5bbb-cad5-43e6-951d-4ecf891e4eaa.zip?sv=2021-08-06&se=2023-04-21T03%3A33%3A47Z&sr=c&sp=rl&sig=8de%2BtBfr%2BWpSaJEnEPMJv4OVBI%2FhmGN7Rd9Poiad4%2Fk%3D>)
### Histogram

#### System.Net.Tests.Perf_WebUtility.Decode_NoDecodingRequired

```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 85.88382809972737 > 82.02973992539344.
IsChangePoint: Marked as a change because one of 3/21/2023 2:53:21 PM, 3/30/2023 4:24:24 AM falls between 3/21/2023 2:53:21 PM and 3/30/2023 4:24:24 AM.
IsRegressionStdDev: Marked as regression because -17.37500544572959 (T) = (0 -84.3051577846581) / Math.Sqrt((0.7881104534835693 / (9)) + (1.1781278896032383 / (30))) is less than -2.026192463026769 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (9) + (30) - 2, .025) and -0.07921447645066419 = (78.11714874500396 - 84.3051577846581) / 78.11714874500396 is less than -0.05.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```


### Docs

[Profiling workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/profiling-workflow-dotnet-runtime.md)
[Benchmarking workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/benchmarking-workflow-dotnet-runtime.md)

</details>

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Regressions in System.Net.Tests.Perf_WebUtility #84140

Run Information

Regressions in System.IO.Tests.Perf_RandomAccess

Repro

Payloads

Payloads

Histogram

System.IO.Tests.Perf_RandomAccess.WriteAsync(fileSize: 1048576, bufferSize: 4096, options: Asynchronous)

Description of detection logic

Docs

Run Information

Regressions in PerfLabTests.BlockCopyPerf

Repro

Payloads

Payloads

Histogram

PerfLabTests.BlockCopyPerf.CallBlockCopy(numElements: 1000)

Description of detection logic

Docs

Run Information