Regressions in System.Text.Tests.Perf_Encoding and Perf_Encoders

### Run Information

Architecture | arm64
-- | --
OS | Windows 10.0.25094
Baseline | [c9742b32bae35fd546f6ed844d48ccf195626ba7](https://github.com/dotnet/runtime/commit/c9742b32bae35fd546f6ed844d48ccf195626ba7)
Compare | [06da0fcf4573115aac76f4afd65cdd75592e86e2](https://github.com/dotnet/runtime/commit/06da0fcf4573115aac76f4afd65cdd75592e86e2)
Diff | [Diff](https://github.com/dotnet/runtime/compare/c9742b32bae35fd546f6ed844d48ccf195626ba7...06da0fcf4573115aac76f4afd65cdd75592e86e2)


### Regressions in System.Text.Tests.Perf_Encoding

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio | Baseline ETL | Compare ETL
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[GetBytes - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_Windows 10.0.25094/System.Text.Tests.Perf_Encoding.GetBytes(size%3a%20512%2c%20encName%3a%20%22utf-8%22).html>) | 265.26 ns | 297.67 ns | 1.12 | 0.69 | False | | |

![graph](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/06_09_2022/refs/heads/main_arm64_Windows%2010.0.25094_Regression/System.Text.Tests.Perf_Encoding_1.png>)
[Test Report](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/06_09_2022/refs/heads/main_arm64_Windows%2010.0.25094_Regression/System.Text.Tests.Perf_Encoding.html>)

### Repro

```cmd
git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_ci.py -f net6.0 --filter 'System.Text.Tests.Perf_Encoding*'
```
<details>

### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-2b7b728f-d003-4428-ac9e-43348d7cae2b6cab770f258436789/d3d603a6-0a87-4b53-8bb4-ff806e672fc9.zip?sv=2019-07-07&se=2022-06-30T13%3A07%3A28Z&sr=c&sp=rl&sig=YBxO8xdmO0SGqSwXyxOjctq%2Beb6BYc01a1Tafw%2FmloY%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-6d18df6c-135c-4860-bf49-62fb5f905ede542d9f22cc8489d8e/047ab126-e405-487a-b09a-ff8c64f81e62.zip?sv=2019-07-07&se=2022-07-01T04%3A57%3A19Z&sr=c&sp=rl&sig=eXhBokuVs75ZBXv%2FzKFKy%2BZHKAday38iaaSVAzumMxo%3D>)
### Histogram

#### System.Text.Tests.Perf_Encoding.GetBytes(size: 512, encName: "utf-8")

```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 297.6709341236771 > 276.9819006858682.
IsChangePoint: Marked as a change because one of 5/31/2022 5:02:26 PM, 6/9/2022 4:58:43 AM falls between 5/31/2022 10:47:41 AM and 6/9/2022 4:58:43 AM.
IsRegressionStdDev: Marked as regression because -5.7326841542386395 (T) = (0 -311.8049826288513) / Math.Sqrt((280.8213364247804 / (11)) + (719.7321643610898 / (34))) is less than -2.016692199226234 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (11) + (34) - 2, .025) and -0.1436918839458107 = (272.63023110132076 - 311.8049826288513) / 272.63023110132076 is less than -0.05.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```

### Docs

[Profiling workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/profiling-workflow-dotnet-runtime.md)
[Benchmarking workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/benchmarking-workflow-dotnet-runtime.md)

</details>
### Run Information

Architecture | arm64
-- | --
OS | Windows 10.0.25094
Baseline | [c9742b32bae35fd546f6ed844d48ccf195626ba7](https://github.com/dotnet/runtime/commit/c9742b32bae35fd546f6ed844d48ccf195626ba7)
Compare | [06da0fcf4573115aac76f4afd65cdd75592e86e2](https://github.com/dotnet/runtime/commit/06da0fcf4573115aac76f4afd65cdd75592e86e2)
Diff | [Diff](https://github.com/dotnet/runtime/compare/c9742b32bae35fd546f6ed844d48ccf195626ba7...06da0fcf4573115aac76f4afd65cdd75592e86e2)


### Regressions in System.Text.Encodings.Web.Tests.Perf_Encoders

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio | Baseline ETL | Compare ETL
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[EncodeUtf8 - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_Windows 10.0.25094/System.Text.Encodings.Web.Tests.Perf_Encoders.EncodeUtf8(arguments%3a%20JavaScript%2cno%20escaping%20required%2c512).html>) | 96.30 ns | 110.85 ns | 1.15 | 0.66 | False | | |

![graph](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/06_09_2022/refs/heads/main_arm64_Windows%2010.0.25094_Regression/System.Text.Encodings.Web.Tests.Perf_Encoders_1.png>)
[Test Report](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/06_09_2022/refs/heads/main_arm64_Windows%2010.0.25094_Regression/System.Text.Encodings.Web.Tests.Perf_Encoders.html>)

### Repro

```cmd
git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_ci.py -f net6.0 --filter 'System.Text.Encodings.Web.Tests.Perf_Encoders*'
```
<details>

### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-2b7b728f-d003-4428-ac9e-43348d7cae2b6cab770f258436789/d3d603a6-0a87-4b53-8bb4-ff806e672fc9.zip?sv=2019-07-07&se=2022-06-30T13%3A07%3A28Z&sr=c&sp=rl&sig=YBxO8xdmO0SGqSwXyxOjctq%2Beb6BYc01a1Tafw%2FmloY%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-6d18df6c-135c-4860-bf49-62fb5f905ede542d9f22cc8489d8e/047ab126-e405-487a-b09a-ff8c64f81e62.zip?sv=2019-07-07&se=2022-07-01T04%3A57%3A19Z&sr=c&sp=rl&sig=eXhBokuVs75ZBXv%2FzKFKy%2BZHKAday38iaaSVAzumMxo%3D>)
### Histogram

#### System.Text.Encodings.Web.Tests.Perf_Encoders.EncodeUtf8(arguments: JavaScript,no escaping required,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 110.8524935605853 > 98.68546502434354.
IsChangePoint: Marked as a change because one of 5/31/2022 5:02:26 PM, 6/9/2022 4:58:43 AM falls between 5/31/2022 10:47:41 AM and 6/9/2022 4:58:43 AM.
IsRegressionStdDev: Marked as regression because -7.850515874716991 (T) = (0 -116.21095716185361) / Math.Sqrt((61.42400947097666 / (11)) + (84.2728866224184 / (34))) is less than -2.016692199226234 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (11) + (34) - 2, .025) and -0.23734486762653884 = (93.9196178869422 - 116.21095716185361) / 93.9196178869422 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.Text.Tests.Perf_Encoding and Perf_Encoders #70501

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