[Perf] Windows/arm64: 23 Regressions on 12/21/2022 4:32:37 PM

### Run Information

Architecture | arm64
-- | --
OS | Windows 10.0.19041
Baseline | [279fb0436f475fbc35ffeff68330f970ee77831a](https://github.com/dotnet/runtime/commit/279fb0436f475fbc35ffeff68330f970ee77831a)
Compare | [8d66372138fca4c9c73eef07c1632f13a0887d8e](https://github.com/dotnet/runtime/commit/8d66372138fca4c9c73eef07c1632f13a0887d8e)
Diff | [Diff](https://github.com/dotnet/runtime/compare/279fb0436f475fbc35ffeff68330f970ee77831a...8d66372138fca4c9c73eef07c1632f13a0887d8e)


### Regressions in System.Tests.Perf_String

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio | Baseline ETL | Compare ETL
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[Join_Enumerable - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_Windows 10.0.19041/System.Tests.Perf_String.Join_Enumerable.html>) | 296.07 ns | 334.66 ns | 1.13 | 0.06 | False | | |
[ToUpperInvariant - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_Windows 10.0.19041/System.Tests.Perf_String.ToUpperInvariant(s%3a%20%22test%22).html>) | 19.83 ns | 25.41 ns | 1.28 | 0.31 | False | | |
[ToLowerInvariant - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_Windows 10.0.19041/System.Tests.Perf_String.ToLowerInvariant(s%3a%20%22test%22).html>) | 6.32 ns | 9.04 ns | 1.43 | 0.34 | False | | |
[ToLower - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_Windows 10.0.19041/System.Tests.Perf_String.ToLower(s%3a%20%22test%22).html>) | 17.23 ns | 19.51 ns | 1.13 | 0.22 | False | | |
[ToUpper - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_Windows 10.0.19041/System.Tests.Perf_String.ToUpper(s%3a%20%22TeSt%22).html>) | 29.71 ns | 33.00 ns | 1.11 | 0.05 | False | | |
[ToLower - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_Windows 10.0.19041/System.Tests.Perf_String.ToLower(s%3a%20%22TEST%22).html>) | 30.42 ns | 33.42 ns | 1.10 | 0.03 | False | | |
[ToUpperInvariant - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_Windows 10.0.19041/System.Tests.Perf_String.ToUpperInvariant(s%3a%20%22TeSt%22).html>) | 21.16 ns | 24.29 ns | 1.15 | 0.32 | False | | |
[ToLowerInvariant - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_Windows 10.0.19041/System.Tests.Perf_String.ToLowerInvariant(s%3a%20%22TEST%22).html>) | 19.80 ns | 25.28 ns | 1.28 | 0.24 | False | | |
[ToLower - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_Windows 10.0.19041/System.Tests.Perf_String.ToLower(s%3a%20%22TeSt%22).html>) | 30.85 ns | 33.68 ns | 1.09 | 0.04 | False | | |
[ToLowerInvariant - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_Windows 10.0.19041/System.Tests.Perf_String.ToLowerInvariant(s%3a%20%22TeSt%22).html>) | 19.48 ns | 23.06 ns | 1.18 | 0.31 | False | | |
[ToUpper - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_Windows 10.0.19041/System.Tests.Perf_String.ToUpper(s%3a%20%22test%22).html>) | 29.30 ns | 32.33 ns | 1.10 | 0.04 | False | | |
[ToUpper - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_Windows 10.0.19041/System.Tests.Perf_String.ToUpper(s%3a%20%22TEST%22).html>) | 14.76 ns | 18.94 ns | 1.28 | 0.24 | False | | |
[ToUpperInvariant - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_Windows 10.0.19041/System.Tests.Perf_String.ToUpperInvariant(s%3a%20%22TEST%22).html>) | 5.65 ns | 9.16 ns | 1.62 | 0.40 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/12_29_2022/refs/heads/main_arm64_Windows%2010.0.19041_Regression/System.Tests.Perf_String_1.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/12_29_2022/refs/heads/main_arm64_Windows%2010.0.19041_Regression/System.Tests.Perf_String_2.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/12_29_2022/refs/heads/main_arm64_Windows%2010.0.19041_Regression/System.Tests.Perf_String_3.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/12_29_2022/refs/heads/main_arm64_Windows%2010.0.19041_Regression/System.Tests.Perf_String_4.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/12_29_2022/refs/heads/main_arm64_Windows%2010.0.19041_Regression/System.Tests.Perf_String_5.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/12_29_2022/refs/heads/main_arm64_Windows%2010.0.19041_Regression/System.Tests.Perf_String_6.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/12_29_2022/refs/heads/main_arm64_Windows%2010.0.19041_Regression/System.Tests.Perf_String_7.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/12_29_2022/refs/heads/main_arm64_Windows%2010.0.19041_Regression/System.Tests.Perf_String_8.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/12_29_2022/refs/heads/main_arm64_Windows%2010.0.19041_Regression/System.Tests.Perf_String_9.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/12_29_2022/refs/heads/main_arm64_Windows%2010.0.19041_Regression/System.Tests.Perf_String_10.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/12_29_2022/refs/heads/main_arm64_Windows%2010.0.19041_Regression/System.Tests.Perf_String_11.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/12_29_2022/refs/heads/main_arm64_Windows%2010.0.19041_Regression/System.Tests.Perf_String_12.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/12_29_2022/refs/heads/main_arm64_Windows%2010.0.19041_Regression/System.Tests.Perf_String_13.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/12_29_2022/refs/heads/main_arm64_Windows%2010.0.19041_Regression/System.Tests.Perf_String.html>)

### Repro

```cmd
git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Tests.Perf_String*'
```
<details>

### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-bff0caa8-66b6-4bfe-b03d-2bc8d9bbc0dccc35d1e8eb047efb9/719317b7-5b75-47a1-a22c-7f5ff3bfd5ef.zip?sv=2021-08-06&se=2023-01-20T04%3A53%3A30Z&sr=c&sp=rl&sig=ouUmg35c8oK4gdP9s3Jg%2F28xL%2B0stY6VkPhpS8Snnt4%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-2ecc92c5-9ffd-4f99-9aa2-403d3319093dc65244535d74804a4/f2a1eede-9dc3-434d-83d3-6cd6fdf2493b.zip?sv=2021-08-06&se=2023-01-20T23%3A18%3A36Z&sr=c&sp=rl&sig=KsmFYJ3qmrbSv5Dk5fLlVcV9m4Vp9ldFkXefF%2B0iSEo%3D>)
### Histogram

#### System.Tests.Perf_String.Join_Enumerable

```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 334.66333073105886 > 310.1232281009754.
IsChangePoint: Marked as a change because one of 9/30/2022 1:24:23 AM, 12/21/2022 10:31:08 AM, 12/28/2022 6:20:56 PM falls between 12/19/2022 10:34:07 PM and 12/28/2022 6:20:56 PM.
IsRegressionStdDev: Marked as regression because -35.56753947678202 (T) = (0 -338.1024718087037) / Math.Sqrt((12.24625632510734 / (13)) + (10.160627020295303 / (20))) is less than -2.0395134463927462 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (13) + (20) - 2, .025) and -0.1450514697595924 = (295.27272855227153 - 338.1024718087037) / 295.27272855227153 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.Tests.Perf_String.ToUpperInvariant(s: "test")

```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 25.414427047072177 > 20.597503598316973.
IsChangePoint: Marked as a change because one of 12/21/2022 10:31:08 AM, 12/28/2022 6:20:56 PM falls between 12/19/2022 10:34:07 PM and 12/28/2022 6:20:56 PM.
IsRegressionStdDev: Marked as regression because -22.061815479173696 (T) = (0 -23.994170338302084) / Math.Sqrt((0.12916561174130706 / (13)) + (0.602321354753627 / (20))) is less than -2.0395134463927462 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (13) + (20) - 2, .025) and -0.22550875253312355 = (19.578946530333784 - 23.994170338302084) / 19.578946530333784 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.Tests.Perf_String.ToLowerInvariant(s: "test")

```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 9.036497944769593 > 6.627082228036932.
IsChangePoint: Marked as a change because one of 12/21/2022 10:31:08 AM, 12/28/2022 6:20:56 PM falls between 12/19/2022 10:34:07 PM and 12/28/2022 6:20:56 PM.
IsRegressionStdDev: Marked as regression because -22.50111154160463 (T) = (0 -9.171730434726742) / Math.Sqrt((0.20891689611225828 / (13)) + (0.024832697954338973 / (20))) is less than -2.0395134463927462 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (13) + (20) - 2, .025) and -0.476660305783434 = (6.2111308869108734 - 9.171730434726742) / 6.2111308869108734 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.Tests.Perf_String.ToLower(s: "test")

```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 19.51009981849415 > 17.985569481689346.
IsChangePoint: Marked as a change because one of 12/21/2022 10:31:08 AM, 12/28/2022 6:20:56 PM falls between 12/19/2022 10:34:07 PM and 12/28/2022 6:20:56 PM.
IsRegressionStdDev: Marked as regression because -19.179701037557003 (T) = (0 -19.597615576673654) / Math.Sqrt((0.14031857224319072 / (13)) + (0.18774109945438738 / (20))) is less than -2.0395134463927462 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (13) + (20) - 2, .025) and -0.16148029786276744 = (16.872964279062764 - 19.597615576673654) / 16.872964279062764 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.Tests.Perf_String.ToUpper(s: "TeSt")

```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 33.000620663713114 > 31.055951448408138.
IsChangePoint: Marked as a change because one of 12/21/2022 10:31:08 AM, 12/28/2022 6:20:56 PM falls between 12/19/2022 10:34:07 PM and 12/28/2022 6:20:56 PM.
IsRegressionStdDev: Marked as regression because -19.43446867925207 (T) = (0 -33.52746689619404) / Math.Sqrt((0.12438905590055883 / (13)) + (0.7008816314786561 / (20))) is less than -2.0395134463927462 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (13) + (20) - 2, .025) and -0.13951471056601336 = (29.422583653650655 - 33.52746689619404) / 29.422583653650655 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.Tests.Perf_String.ToLower(s: "TEST")

```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 33.417354494004385 > 31.84558462930623.
IsChangePoint: Marked as a change because one of 12/21/2022 10:31:08 AM, 12/28/2022 6:20:56 PM falls between 12/19/2022 10:34:07 PM and 12/28/2022 6:20:56 PM.
IsRegressionStdDev: Marked as regression because -13.395060246232482 (T) = (0 -34.13213888290169) / Math.Sqrt((0.2832731455885848 / (13)) + (1.3289671016411684 / (20))) is less than -2.0395134463927462 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (13) + (20) - 2, .025) and -0.13195973790609833 = (30.153138614310965 - 34.13213888290169) / 30.153138614310965 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.Tests.Perf_String.ToUpperInvariant(s: "TeSt")

```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 24.290574363224817 > 20.791499677158964.
IsChangePoint: Marked as a change because one of 12/21/2022 10:31:08 AM, 12/28/2022 6:20:56 PM falls between 12/19/2022 10:34:07 PM and 12/28/2022 6:20:56 PM.
IsRegressionStdDev: Marked as regression because -19.518210726867927 (T) = (0 -23.98887070096966) / Math.Sqrt((0.3014290855452062 / (13)) + (0.432212644573708 / (20))) is less than -2.0395134463927462 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (13) + (20) - 2, .025) and -0.2080350723349983 = (19.857760134895607 - 23.98887070096966) / 19.857760134895607 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.Tests.Perf_String.ToLowerInvariant(s: "TEST")

```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 25.27565528156059 > 20.77821741123003.
IsChangePoint: Marked as a change because one of 12/21/2022 10:31:08 AM, 12/28/2022 6:20:56 PM falls between 12/19/2022 10:34:07 PM and 12/28/2022 6:20:56 PM.
IsRegressionStdDev: Marked as regression because -19.773528258430883 (T) = (0 -23.9518979242687) / Math.Sqrt((0.4383164479841955 / (13)) + (0.3000113879439696 / (20))) is less than -2.0395134463927462 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (13) + (20) - 2, .025) and -0.2228161388680815 = (19.587489208672157 - 23.9518979242687) / 19.587489208672157 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.Tests.Perf_String.ToLower(s: "TeSt")

```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 33.67716767418449 > 32.01994829408373.
IsChangePoint: Marked as a change because one of 12/21/2022 10:31:08 AM, 12/28/2022 6:20:56 PM falls between 12/19/2022 10:34:07 PM and 12/28/2022 6:20:56 PM.
IsRegressionStdDev: Marked as regression because -17.14699364826293 (T) = (0 -33.84112233688593) / Math.Sqrt((0.26412430448800156 / (13)) + (0.44141920804607765 / (20))) is less than -2.0395134463927462 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (13) + (20) - 2, .025) and -0.11646963280450641 = (30.310830982369858 - 33.84112233688593) / 30.310830982369858 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.Tests.Perf_String.ToLowerInvariant(s: "TeSt")

```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 23.063296915172234 > 20.505618850660184.
IsChangePoint: Marked as a change because one of 12/21/2022 10:31:08 AM, 12/28/2022 6:20:56 PM falls between 12/19/2022 10:34:07 PM and 12/28/2022 6:20:56 PM.
IsRegressionStdDev: Marked as regression because -33.090668274750065 (T) = (0 -23.911675199947346) / Math.Sqrt((0.08327327970194669 / (13)) + (0.21458909181712643 / (20))) is less than -2.0395134463927462 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (13) + (20) - 2, .025) and -0.22122514391528453 = (19.580071143381307 - 23.911675199947346) / 19.580071143381307 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.Tests.Perf_String.ToUpper(s: "test")

```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 32.332151632345 > 30.804338657715615.
IsChangePoint: Marked as a change because one of 12/21/2022 10:31:08 AM, 12/28/2022 6:20:56 PM falls between 12/19/2022 10:34:07 PM and 12/28/2022 6:20:56 PM.
IsRegressionStdDev: Marked as regression because -26.337359233834636 (T) = (0 -33.62495721567597) / Math.Sqrt((0.10092346314378493 / (13)) + (0.3675918892346647 / (20))) is less than -2.0395134463927462 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (13) + (20) - 2, .025) and -0.14500962102741463 = (29.36652810437031 - 33.62495721567597) / 29.36652810437031 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.Tests.Perf_String.ToUpper(s: "TEST")

```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 18.942335073449645 > 16.817424168362383.
IsChangePoint: Marked as a change because one of 12/21/2022 10:31:08 AM, 12/28/2022 6:20:56 PM falls between 12/19/2022 10:34:07 PM and 12/28/2022 6:20:56 PM.
IsRegressionStdDev: Marked as regression because -14.595238090343788 (T) = (0 -18.545804408767488) / Math.Sqrt((0.2629325554235216 / (13)) + (0.26753598986410165 / (20))) is less than -2.0395134463927462 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (13) + (20) - 2, .025) and -0.16858133008526954 = (15.8703582979665 - 18.545804408767488) / 15.8703582979665 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.Tests.Perf_String.ToUpperInvariant(s: "TEST")

```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 9.155163945008864 > 6.44893053461952.
IsChangePoint: Marked as a change because one of 12/21/2022 10:31:08 AM, 12/28/2022 6:20:56 PM falls between 12/19/2022 10:34:07 PM and 12/28/2022 6:20:56 PM.
IsRegressionStdDev: Marked as regression because -25.68438599814117 (T) = (0 -9.30690673955127) / Math.Sqrt((0.1734794542635362 / (13)) + (0.02865013532801322 / (20))) is less than -2.0395134463927462 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (13) + (20) - 2, .025) and -0.5048307453179597 = (6.184686728728943 - 9.30690673955127) / 6.184686728728943 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 10.0.19041
Baseline | [279fb0436f475fbc35ffeff68330f970ee77831a](https://github.com/dotnet/runtime/commit/279fb0436f475fbc35ffeff68330f970ee77831a)
Compare | [8d66372138fca4c9c73eef07c1632f13a0887d8e](https://github.com/dotnet/runtime/commit/8d66372138fca4c9c73eef07c1632f13a0887d8e)
Diff | [Diff](https://github.com/dotnet/runtime/compare/279fb0436f475fbc35ffeff68330f970ee77831a...8d66372138fca4c9c73eef07c1632f13a0887d8e)


### Regressions in System.Text.Perf_Utf8Encoding

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio | Baseline ETL | Compare ETL
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[GetByteCount - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_Windows 10.0.19041/System.Text.Perf_Utf8Encoding.GetByteCount(Input%3a%20Cyrillic).html>) | 17.92 μs | 34.17 μs | 1.91 | 0.01 | False | | |
[GetByteCount - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_Windows 10.0.19041/System.Text.Perf_Utf8Encoding.GetByteCount(Input%3a%20Chinese).html>) | 23.79 μs | 40.12 μs | 1.69 | 0.00 | False | | |
[GetByteCount - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_Windows 10.0.19041/System.Text.Perf_Utf8Encoding.GetByteCount(Input%3a%20EnglishMostlyAscii).html>) | 51.81 μs | 86.77 μs | 1.67 | 0.00 | False | | |
[GetBytes - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_Windows 10.0.19041/System.Text.Perf_Utf8Encoding.GetBytes(Input%3a%20Cyrillic).html>) | 123.69 μs | 141.71 μs | 1.15 | 0.00 | False | | |
[GetBytes - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_Windows 10.0.19041/System.Text.Perf_Utf8Encoding.GetBytes(Input%3a%20Greek).html>) | 197.98 μs | 215.88 μs | 1.09 | 0.00 | False | | |
[GetBytes - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_Windows 10.0.19041/System.Text.Perf_Utf8Encoding.GetBytes(Input%3a%20EnglishMostlyAscii).html>) | 146.39 μs | 181.08 μs | 1.24 | 0.00 | False | | |
[GetByteCount - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_Windows 10.0.19041/System.Text.Perf_Utf8Encoding.GetByteCount(Input%3a%20Greek).html>) | 25.96 μs | 43.57 μs | 1.68 | 0.00 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/12_29_2022/refs/heads/main_arm64_Windows%2010.0.19041_Regression/System.Text.Perf_Utf8Encoding_1.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/12_29_2022/refs/heads/main_arm64_Windows%2010.0.19041_Regression/System.Text.Perf_Utf8Encoding_2.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/12_29_2022/refs/heads/main_arm64_Windows%2010.0.19041_Regression/System.Text.Perf_Utf8Encoding_3.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/12_29_2022/refs/heads/main_arm64_Windows%2010.0.19041_Regression/System.Text.Perf_Utf8Encoding_4.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/12_29_2022/refs/heads/main_arm64_Windows%2010.0.19041_Regression/System.Text.Perf_Utf8Encoding_5.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/12_29_2022/refs/heads/main_arm64_Windows%2010.0.19041_Regression/System.Text.Perf_Utf8Encoding_6.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/12_29_2022/refs/heads/main_arm64_Windows%2010.0.19041_Regression/System.Text.Perf_Utf8Encoding_7.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/12_29_2022/refs/heads/main_arm64_Windows%2010.0.19041_Regression/System.Text.Perf_Utf8Encoding.html>)

### Repro

```cmd
git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Text.Perf_Utf8Encoding*'
```
<details>

### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-bff0caa8-66b6-4bfe-b03d-2bc8d9bbc0dccc35d1e8eb047efb9/719317b7-5b75-47a1-a22c-7f5ff3bfd5ef.zip?sv=2021-08-06&se=2023-01-20T04%3A53%3A30Z&sr=c&sp=rl&sig=ouUmg35c8oK4gdP9s3Jg%2F28xL%2B0stY6VkPhpS8Snnt4%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-2ecc92c5-9ffd-4f99-9aa2-403d3319093dc65244535d74804a4/f2a1eede-9dc3-434d-83d3-6cd6fdf2493b.zip?sv=2021-08-06&se=2023-01-20T23%3A18%3A36Z&sr=c&sp=rl&sig=KsmFYJ3qmrbSv5Dk5fLlVcV9m4Vp9ldFkXefF%2B0iSEo%3D>)
### Histogram

#### System.Text.Perf_Utf8Encoding.GetByteCount(Input: Cyrillic)

```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 34.16599150031192 > 18.81367854071101.
IsChangePoint: Marked as a change because one of 10/14/2022 9:06:25 AM, 12/21/2022 10:31:08 AM, 12/28/2022 6:20:56 PM falls between 12/19/2022 10:34:07 PM and 12/28/2022 6:20:56 PM.
IsRegressionStdDev: Marked as regression because -8568.995089522856 (T) = (0 -34164.00743610237) / Math.Sqrt((30.758538662959406 / (13)) + (24.571060388198948 / (20))) is less than -2.0395134463927462 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (13) + (20) - 2, .025) and -0.9067190563681012 = (17917.69339169328 - 34164.00743610237) / 17917.69339169328 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.Perf_Utf8Encoding.GetByteCount(Input: Chinese)

```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 40.1208949704142 > 24.9784349552892.
IsChangePoint: Marked as a change because one of 12/21/2022 10:31:08 AM, 12/28/2022 6:20:56 PM falls between 12/19/2022 10:34:07 PM and 12/28/2022 6:20:56 PM.
IsRegressionStdDev: Marked as regression because -6727.035352665285 (T) = (0 -40134.01645034987) / Math.Sqrt((27.045655028749024 / (13)) + (76.45384947871726 / (20))) is less than -2.0395134463927462 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (13) + (20) - 2, .025) and -0.6870280536832469 = (23789.774190610675 - 40134.01645034987) / 23789.774190610675 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.Perf_Utf8Encoding.GetByteCount(Input: EnglishMostlyAscii)

```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 86.76546221389108 > 54.466236225961545.
IsChangePoint: Marked as a change because one of 12/21/2022 10:31:08 AM, 12/28/2022 6:20:56 PM falls between 12/19/2022 10:34:07 PM and 12/28/2022 6:20:56 PM.
IsRegressionStdDev: Marked as regression because -915.7129729032915 (T) = (0 -86769.46212714349) / Math.Sqrt((18520.589505035812 / (13)) + (505.19599847967487 / (20))) is less than -2.0395134463927462 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (13) + (20) - 2, .025) and -0.6718229719017443 = (51901.10650797007 - 86769.46212714349) / 51901.10650797007 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.Perf_Utf8Encoding.GetBytes(Input: Cyrillic)

```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 141.70833333333337 > 129.93362967519684.
IsChangePoint: Marked as a change because one of 11/30/2022 2:05:04 AM, 12/21/2022 10:31:08 AM, 12/28/2022 6:20:56 PM falls between 12/19/2022 10:34:07 PM and 12/28/2022 6:20:56 PM.
IsRegressionStdDev: Marked as regression because -154.90269403697508 (T) = (0 -141518.9849586993) / Math.Sqrt((29511.042669360813 / (13)) + (215669.12084546566 / (20))) is less than -2.0395134463927462 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (13) + (20) - 2, .025) and -0.14293172819960412 = (123821.03100911037 - 141518.9849586993) / 123821.03100911037 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.Perf_Utf8Encoding.GetBytes(Input: Greek)

```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 215.87748842592592 > 208.3405915033674.
IsChangePoint: Marked as a change because one of 11/30/2022 2:05:04 AM, 12/21/2022 10:31:08 AM, 12/28/2022 6:20:56 PM falls between 12/19/2022 10:34:07 PM and 12/28/2022 6:20:56 PM.
IsRegressionStdDev: Marked as regression because -52.80859080276642 (T) = (0 -217844.13584237377) / Math.Sqrt((842773.0640384926 / (13)) + (1498820.1294783743 / (20))) is less than -2.0395134463927462 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (13) + (20) - 2, .025) and -0.09966069955928718 = (198101.22879691847 - 217844.13584237377) / 198101.22879691847 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.Perf_Utf8Encoding.GetBytes(Input: EnglishMostlyAscii)

```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 181.0798782771536 > 154.0526226635514.
IsChangePoint: Marked as a change because one of 12/21/2022 10:31:08 AM, 12/28/2022 6:20:56 PM falls between 12/19/2022 10:34:07 PM and 12/28/2022 6:20:56 PM.
IsRegressionStdDev: Marked as regression because -301.52435481089407 (T) = (0 -180895.914878383) / Math.Sqrt((49613.73812359402 / (13)) + (178722.17948667676 / (20))) is less than -2.0395134463927462 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (13) + (20) - 2, .025) and -0.23187820694107752 = (146845.61660326173 - 180895.914878383) / 146845.61660326173 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.Perf_Utf8Encoding.GetByteCount(Input: Greek)

```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 43.57316968430826 > 27.2476458519678.
IsChangePoint: Marked as a change because one of 12/21/2022 10:31:08 AM, 12/28/2022 6:20:56 PM falls between 12/19/2022 10:34:07 PM and 12/28/2022 6:20:56 PM.
IsRegressionStdDev: Marked as regression because -1860.5546188179449 (T) = (0 -43550.95653844046) / Math.Sqrt((700.9654185582541 / (13)) + (710.035346761315 / (20))) is less than -2.0395134463927462 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (13) + (20) - 2, .025) and -0.6778156796942642 = (25956.93738323892 - 43550.95653844046) / 25956.93738323892 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 10.0.19041
Baseline | [279fb0436f475fbc35ffeff68330f970ee77831a](https://github.com/dotnet/runtime/commit/279fb0436f475fbc35ffeff68330f970ee77831a)
Compare | [8d66372138fca4c9c73eef07c1632f13a0887d8e](https://github.com/dotnet/runtime/commit/8d66372138fca4c9c73eef07c1632f13a0887d8e)
Diff | [Diff](https://github.com/dotnet/runtime/compare/279fb0436f475fbc35ffeff68330f970ee77831a...8d66372138fca4c9c73eef07c1632f13a0887d8e)


### Regressions in System.ComponentModel.Tests.Perf_TypeDescriptorTests

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio | Baseline ETL | Compare ETL
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[GetConverter - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_Windows 10.0.19041/System.ComponentModel.Tests.Perf_TypeDescriptorTests.GetConverter(typeToConvert%3a%20typeof(System.Guid)).html>) | 173.99 ns | 194.21 ns | 1.12 | 0.03 | False | | |
[GetConverter - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_Windows 10.0.19041/System.ComponentModel.Tests.Perf_TypeDescriptorTests.GetConverter(typeToConvert%3a%20typeof(string)).html>) | 116.55 ns | 129.12 ns | 1.11 | 0.03 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/12_29_2022/refs/heads/main_arm64_Windows%2010.0.19041_Regression/System.ComponentModel.Tests.Perf_TypeDescriptorTests_1.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/12_29_2022/refs/heads/main_arm64_Windows%2010.0.19041_Regression/System.ComponentModel.Tests.Perf_TypeDescriptorTests_2.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/12_29_2022/refs/heads/main_arm64_Windows%2010.0.19041_Regression/System.ComponentModel.Tests.Perf_TypeDescriptorTests.html>)

### Repro

```cmd
git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.ComponentModel.Tests.Perf_TypeDescriptorTests*'
```
<details>

### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-bff0caa8-66b6-4bfe-b03d-2bc8d9bbc0dccc35d1e8eb047efb9/719317b7-5b75-47a1-a22c-7f5ff3bfd5ef.zip?sv=2021-08-06&se=2023-01-20T04%3A53%3A30Z&sr=c&sp=rl&sig=ouUmg35c8oK4gdP9s3Jg%2F28xL%2B0stY6VkPhpS8Snnt4%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-2ecc92c5-9ffd-4f99-9aa2-403d3319093dc65244535d74804a4/f2a1eede-9dc3-434d-83d3-6cd6fdf2493b.zip?sv=2021-08-06&se=2023-01-20T23%3A18%3A36Z&sr=c&sp=rl&sig=KsmFYJ3qmrbSv5Dk5fLlVcV9m4Vp9ldFkXefF%2B0iSEo%3D>)
### Histogram

#### System.ComponentModel.Tests.Perf_TypeDescriptorTests.GetConverter(typeToConvert: typeof(System.Guid))

```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 194.21294329564145 > 181.62521817889.
IsChangePoint: Marked as a change because one of 10/6/2022 2:13:23 PM, 12/21/2022 10:31:08 AM, 12/28/2022 6:20:56 PM falls between 12/19/2022 10:34:07 PM and 12/28/2022 6:20:56 PM.
IsRegressionStdDev: Marked as regression because -39.33973176724806 (T) = (0 -194.72908774562407) / Math.Sqrt((2.2746909683452006 / (13)) + (2.0519011197646444 / (20))) is less than -2.0395134463927462 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (13) + (20) - 2, .025) and -0.11911380118318617 = (174.00293655546577 - 194.72908774562407) / 174.00293655546577 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.ComponentModel.Tests.Perf_TypeDescriptorTests.GetConverter(typeToConvert: typeof(string))

```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 129.11781944754324 > 122.06454926686476.
IsChangePoint: Marked as a change because one of 9/22/2022 3:11:11 PM, 9/27/2022 9:53:04 AM, 10/6/2022 2:13:23 PM, 12/21/2022 10:31:08 AM, 12/28/2022 6:20:56 PM falls between 12/19/2022 10:34:07 PM and 12/28/2022 6:20:56 PM.
IsRegressionStdDev: Marked as regression because -31.88883289065751 (T) = (0 -127.99747529264737) / Math.Sqrt((0.4536949040804344 / (13)) + (1.9810635166438846 / (20))) is less than -2.0395134463927462 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (13) + (20) - 2, .025) and -0.10033133067123312 = (116.32630256430606 - 127.99747529264737) / 116.32630256430606 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 10.0.19041
Baseline | [279fb0436f475fbc35ffeff68330f970ee77831a](https://github.com/dotnet/runtime/commit/279fb0436f475fbc35ffeff68330f970ee77831a)
Compare | [8d66372138fca4c9c73eef07c1632f13a0887d8e](https://github.com/dotnet/runtime/commit/8d66372138fca4c9c73eef07c1632f13a0887d8e)
Diff | [Diff](https://github.com/dotnet/runtime/compare/279fb0436f475fbc35ffeff68330f970ee77831a...8d66372138fca4c9c73eef07c1632f13a0887d8e)


### 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
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[GetByteCount - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_Windows 10.0.19041/System.Text.Tests.Perf_Encoding.GetByteCount(size%3a%2016%2c%20encName%3a%20%22utf-8%22).html>) | 10.60 ns | 11.90 ns | 1.12 | 0.11 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/12_29_2022/refs/heads/main_arm64_Windows%2010.0.19041_Regression/System.Text.Tests.Perf_Encoding_1.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/12_29_2022/refs/heads/main_arm64_Windows%2010.0.19041_Regression/System.Text.Tests.Perf_Encoding.html>)

### Repro

```cmd
git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Text.Tests.Perf_Encoding*'
```
<details>

### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-bff0caa8-66b6-4bfe-b03d-2bc8d9bbc0dccc35d1e8eb047efb9/719317b7-5b75-47a1-a22c-7f5ff3bfd5ef.zip?sv=2021-08-06&se=2023-01-20T04%3A53%3A30Z&sr=c&sp=rl&sig=ouUmg35c8oK4gdP9s3Jg%2F28xL%2B0stY6VkPhpS8Snnt4%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-2ecc92c5-9ffd-4f99-9aa2-403d3319093dc65244535d74804a4/f2a1eede-9dc3-434d-83d3-6cd6fdf2493b.zip?sv=2021-08-06&se=2023-01-20T23%3A18%3A36Z&sr=c&sp=rl&sig=KsmFYJ3qmrbSv5Dk5fLlVcV9m4Vp9ldFkXefF%2B0iSEo%3D>)
### Histogram

#### System.Text.Tests.Perf_Encoding.GetByteCount(size: 16, 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 11.90207453945245 > 11.175408462193328.
IsChangePoint: Marked as a change because one of 9/13/2022 2:36:07 PM, 11/21/2022 10:59:14 PM, 12/21/2022 10:31:08 AM, 12/28/2022 6:20:56 PM falls between 12/19/2022 10:34:07 PM and 12/28/2022 6:20:56 PM.
IsRegressionStdDev: Marked as regression because -13.338569703714693 (T) = (0 -12.233820410584944) / Math.Sqrt((0.04504923734971284 / (13)) + (0.1980317719117278 / (20))) is less than -2.0395134463927462 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (13) + (20) - 2, .025) and -0.14423778044593555 = (10.691676694871187 - 12.233820410584944) / 10.691676694871187 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	arm64
OS	Windows 10.0.19041
Baseline	279fb0436f475fbc35ffeff68330f970ee77831a
Compare	8d66372138fca4c9c73eef07c1632f13a0887d8e
Diff	Diff

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector
Join_Enumerable - Duration of single invocation	296.07 ns	334.66 ns	1.13	0.06	False
ToUpperInvariant - Duration of single invocation	19.83 ns	25.41 ns	1.28	0.31	False
ToLowerInvariant - Duration of single invocation	6.32 ns	9.04 ns	1.43	0.34	False
ToLower - Duration of single invocation	17.23 ns	19.51 ns	1.13	0.22	False
ToUpper - Duration of single invocation	29.71 ns	33.00 ns	1.11	0.05	False
ToLower - Duration of single invocation	30.42 ns	33.42 ns	1.10	0.03	False
ToUpperInvariant - Duration of single invocation	21.16 ns	24.29 ns	1.15	0.32	False
ToLowerInvariant - Duration of single invocation	19.80 ns	25.28 ns	1.28	0.24	False
ToLower - Duration of single invocation	30.85 ns	33.68 ns	1.09	0.04	False
ToLowerInvariant - Duration of single invocation	19.48 ns	23.06 ns	1.18	0.31	False
ToUpper - Duration of single invocation	29.30 ns	32.33 ns	1.10	0.04	False
ToUpper - Duration of single invocation	14.76 ns	18.94 ns	1.28	0.24	False
ToUpperInvariant - Duration of single invocation	5.65 ns	9.16 ns	1.62	0.40	False

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector
GetByteCount - Duration of single invocation	17.92 μs	34.17 μs	1.91	0.01	False
GetByteCount - Duration of single invocation	23.79 μs	40.12 μs	1.69	0.00	False
GetByteCount - Duration of single invocation	51.81 μs	86.77 μs	1.67	0.00	False
GetBytes - Duration of single invocation	123.69 μs	141.71 μs	1.15	0.00	False
GetBytes - Duration of single invocation	197.98 μs	215.88 μs	1.09	0.00	False
GetBytes - Duration of single invocation	146.39 μs	181.08 μs	1.24	0.00	False
GetByteCount - Duration of single invocation	25.96 μs	43.57 μs	1.68	0.00	False

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio	Baseline ETL	Compare ETL
GetConverter - Duration of single invocation	173.99 ns	194.21 ns	1.12	0.03	False
GetConverter - Duration of single invocation	116.55 ns	129.12 ns	1.11	0.03	False

[Perf] Windows/arm64: 23 Regressions on 12/21/2022 4:32:37 PM #11194

Description

performanceautofileropenedon Dec 29, 2022

Run Information

Regressions in System.Tests.Perf_String

Repro

Payloads

Histogram

System.Tests.Perf_String.Join_Enumerable

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

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

Regressions in System.Text.Perf_Utf8Encoding

Repro

Payloads

Histogram

System.Text.Perf_Utf8Encoding.GetByteCount(Input: Cyrillic)

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

Regressions in System.ComponentModel.Tests.Perf_TypeDescriptorTests

Repro

Payloads

Histogram

System.ComponentModel.Tests.Perf_TypeDescriptorTests.GetConverter(typeToConvert: typeof(System.Guid))

Description of detection logic

Description of detection logic

Docs

Run Information

Regressions in System.Text.Tests.Perf_Encoding

Repro

Payloads

Histogram

System.Text.Tests.Perf_Encoding.GetByteCount(size: 16, encName: "utf-8")

Description of detection logic

Docs

Metadata

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Issue actions

performanceautofiler
openedon Dec 29, 2022