Regressions in System.Tests.Perf_String Case Conversion

### Run Information

Architecture | arm64
-- | --
OS | Windows 10.0.25094
Baseline | [5fdc1882a63dd1e34ad852f9bfc1964c511e5bfb](https://github.com/dotnet/runtime/commit/5fdc1882a63dd1e34ad852f9bfc1964c511e5bfb)
Compare | [f85d515e2f64ddd5b014585d2d10a005ce55943e](https://github.com/dotnet/runtime/commit/f85d515e2f64ddd5b014585d2d10a005ce55943e)
Diff | [Diff](https://github.com/dotnet/runtime/compare/5fdc1882a63dd1e34ad852f9bfc1964c511e5bfb...f85d515e2f64ddd5b014585d2d10a005ce55943e)


### 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
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[ToUpperInvariant - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_Windows 10.0.25094/System.Tests.Perf_String.ToUpperInvariant(s%3a%20%22TeSt%22).html>) | 28.29 ns | 39.48 ns | 1.40 | 0.72 | False | | |
[ToUpperInvariant - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_Windows 10.0.25094/System.Tests.Perf_String.ToUpperInvariant(s%3a%20%22TEST%22).html>) | 9.05 ns | 11.98 ns | 1.32 | 0.77 | False | | |
[ToUpper - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_Windows 10.0.25094/System.Tests.Perf_String.ToUpper(s%3a%20%22TEST%22).html>) | 19.02 ns | 29.27 ns | 1.54 | 0.71 | False | | |
[ToLowerInvariant - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_Windows 10.0.25094/System.Tests.Perf_String.ToLowerInvariant(s%3a%20%22test%22).html>) | 8.80 ns | 12.60 ns | 1.43 | 0.81 | False | | |
[ToLower - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_Windows 10.0.25094/System.Tests.Perf_String.ToLower(s%3a%20%22TEST%22).html>) | 42.54 ns | 57.78 ns | 1.36 | 0.68 | False | | |
[ToLowerInvariant - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_Windows 10.0.25094/System.Tests.Perf_String.ToLowerInvariant(s%3a%20%22TeSt%22).html>) | 24.94 ns | 36.73 ns | 1.47 | 0.72 | False | | |
[ToUpper - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_Windows 10.0.25094/System.Tests.Perf_String.ToUpper(s%3a%20%22test%22).html>) | 45.27 ns | 52.32 ns | 1.16 | 0.58 | False | | |
[ToUpper - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_Windows 10.0.25094/System.Tests.Perf_String.ToUpper(s%3a%20%22TeSt%22).html>) | 44.98 ns | 56.00 ns | 1.24 | 0.62 | False | | |

![graph](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/12_29_2022/refs/heads/main_arm64_Windows%2010.0.25094_Regression/System.Tests.Perf_String_1.png>)
![graph](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/12_29_2022/refs/heads/main_arm64_Windows%2010.0.25094_Regression/System.Tests.Perf_String_2.png>)
![graph](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/12_29_2022/refs/heads/main_arm64_Windows%2010.0.25094_Regression/System.Tests.Perf_String_3.png>)
![graph](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/12_29_2022/refs/heads/main_arm64_Windows%2010.0.25094_Regression/System.Tests.Perf_String_4.png>)
![graph](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/12_29_2022/refs/heads/main_arm64_Windows%2010.0.25094_Regression/System.Tests.Perf_String_5.png>)
![graph](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/12_29_2022/refs/heads/main_arm64_Windows%2010.0.25094_Regression/System.Tests.Perf_String_6.png>)
![graph](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/12_29_2022/refs/heads/main_arm64_Windows%2010.0.25094_Regression/System.Tests.Perf_String_7.png>)
![graph](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/12_29_2022/refs/heads/main_arm64_Windows%2010.0.25094_Regression/System.Tests.Perf_String_8.png>)
[Test Report](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/12_29_2022/refs/heads/main_arm64_Windows%2010.0.25094_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-4624cd99-b693-4101-9daa-6a8b8567bdb47822b21aedf47caa5/1466aae5-def5-4a54-b4d0-d5cc6909d249.zip?sv=2021-08-06&se=2023-01-20T12%3A48%3A01Z&sr=c&sp=rl&sig=LDe%2FGcZ%2BZ7kVzNCYGAbCX6GCje%2BU6tFCp1uannptqQ4%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-a5cad55a-65d6-4eba-8da4-572d53c560b35ba7bedcb174536be/dada5e92-0497-4e8c-80d8-c701a9c1805b.zip?sv=2021-08-06&se=2023-01-21T04%3A39%3A39Z&sr=c&sp=rl&sig=eNGyjwHka7Z8EI%2Fwi3LTd3lbdh6lgLOMflIYJ6JQuNc%3D>)
### Histogram

#### 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 39.47873435471007 > 29.55419313532894.
IsChangePoint: Marked as a change because one of 12/21/2022 4:32:37 PM, 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 -7.516307420817177 (T) = (0 -36.31159282300522) / Math.Sqrt((6.485055935336934 / (14)) + (12.04881980952785 / (19))) is less than -2.0395134463927462 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (14) + (19) - 2, .025) and -0.2768748064919276 = (28.437864572461343 - 36.31159282300522) / 28.437864572461343 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 11.975986271581252 > 8.57081540231266.
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 -10.528910434957075 (T) = (0 -12.670162918498763) / Math.Sqrt((0.9342617633884106 / (13)) + (1.3978707752175097 / (20))) is less than -2.0395134463927462 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (13) + (20) - 2, .025) and -0.455349894058753 = (8.705922177355973 - 12.670162918498763) / 8.705922177355973 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 29.270366724424157 > 23.711182658784026.
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 -4.729387196157553 (T) = (0 -29.081157109263945) / Math.Sqrt((7.270743704699143 / (13)) + (18.92406524654969 / (20))) is less than -2.0395134463927462 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (13) + (20) - 2, .025) and -0.249283338924745 = (23.278271792445437 - 29.081157109263945) / 23.278271792445437 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 12.60029331392485 > 10.08381371016749.
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 -13.323683013167399 (T) = (0 -13.312894081097156) / Math.Sqrt((0.7323565603260572 / (13)) + (0.922625991673902 / (20))) is less than -2.0395134463927462 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (13) + (20) - 2, .025) and -0.47137407848493657 = (9.047933000699148 - 13.312894081097156) / 9.047933000699148 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 57.78163572052392 > 45.89678537255734.
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 -9.773996404508368 (T) = (0 -57.90920894745648) / Math.Sqrt((18.524028895609252 / (13)) + (15.211097039304933 / (20))) is less than -2.0395134463927462 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (13) + (20) - 2, .025) and -0.3324730115054145 = (43.45994886758062 - 57.90920894745648) / 43.45994886758062 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 36.725989098628034 > 27.801417460552333.
IsChangePoint: Marked as a change because one of 12/21/2022 4:32:37 PM, 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 -8.310103036986714 (T) = (0 -37.18313751161428) / Math.Sqrt((13.233221291647697 / (14)) + (5.573183595058514 / (19))) is less than -2.0395134463927462 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (14) + (19) - 2, .025) and -0.3310691743603315 = (27.93478973734275 - 37.18313751161428) / 27.93478973734275 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 52.323958191242674 > 47.40437991582669.
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 -4.4004308610229765 (T) = (0 -50.867662849307834) / Math.Sqrt((11.393547554407128 / (13)) + (35.81423435130752 / (20))) is less than -2.0395134463927462 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (13) + (20) - 2, .025) and -0.164521962629386 = (43.681153710878256 - 50.867662849307834) / 43.681153710878256 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 56.00128879385484 > 46.33821886816768.
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 -6.77350029426643 (T) = (0 -52.110090547734465) / Math.Sqrt((11.084131575618784 / (13)) + (14.915230097096984 / (20))) is less than -2.0395134463927462 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (13) + (20) - 2, .025) and -0.196652975524235 = (43.54653488820002 - 52.110090547734465) / 43.54653488820002 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.Tests.Perf_String Case Conversion #80245

Run Information

Regressions in System.Tests.Perf_String

Repro

Payloads

Histogram

System.Tests.Perf_String.ToUpperInvariant(s: "TeSt")

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

Metadata

Assignees

Labels

Type

Projects

Milestone

Relationships

Development

Architecture	arm64
OS	Windows 10.0.25094
Baseline	5fdc1882a63dd1e34ad852f9bfc1964c511e5bfb
Compare	f85d515e2f64ddd5b014585d2d10a005ce55943e
Diff	Diff

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector
ToUpperInvariant - Duration of single invocation	28.29 ns	39.48 ns	1.40	0.72	False
ToUpperInvariant - Duration of single invocation	9.05 ns	11.98 ns	1.32	0.77	False
ToUpper - Duration of single invocation	19.02 ns	29.27 ns	1.54	0.71	False
ToLowerInvariant - Duration of single invocation	8.80 ns	12.60 ns	1.43	0.81	False
ToLower - Duration of single invocation	42.54 ns	57.78 ns	1.36	0.68	False
ToLowerInvariant - Duration of single invocation	24.94 ns	36.73 ns	1.47	0.72	False
ToUpper - Duration of single invocation	45.27 ns	52.32 ns	1.16	0.58	False
ToUpper - Duration of single invocation	44.98 ns	56.00 ns	1.24	0.62	False

Regressions in System.Tests.Perf_String Case Conversion #80245

Description

Run Information

Regressions in System.Tests.Perf_String

Repro

Payloads

Histogram

System.Tests.Perf_String.ToUpperInvariant(s: "TeSt")

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

Metadata

Metadata

Assignees

Labels

Type

Projects

Milestone

Relationships

Development

Issue actions