Regressions in System.Threading.Tests.Perf_Timer

### Run Information

Architecture | arm64
-- | --
OS | Windows 10.0.25094
Baseline | [aa8fe36e105a1c0498c733b69685b12f820175df](https://github.com/dotnet/runtime/commit/aa8fe36e105a1c0498c733b69685b12f820175df)
Compare | [843441ecc0831b0621bdf7561e73c5d77cd4301b](https://github.com/dotnet/runtime/commit/843441ecc0831b0621bdf7561e73c5d77cd4301b)
Diff | [Diff](https://github.com/dotnet/runtime/compare/aa8fe36e105a1c0498c733b69685b12f820175df...843441ecc0831b0621bdf7561e73c5d77cd4301b)


### Regressions in System.Threading.Tests.Perf_Timer

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio | Baseline ETL | Compare ETL
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[ScheduleManyThenDisposeMany - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_Windows 10.0.25094/System.Threading.Tests.Perf_Timer.ScheduleManyThenDisposeMany.html>) | 595.44 ms | 779.50 ms | 1.31 | 0.22 | False | | |

![graph](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/12_08_2022/refs/heads/main_arm64_Windows%2010.0.25094_Regression/System.Threading.Tests.Perf_Timer_1.png>)
[Test Report](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/12_08_2022/refs/heads/main_arm64_Windows%2010.0.25094_Regression/System.Threading.Tests.Perf_Timer.html>)

### Repro

```cmd
git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Threading.Tests.Perf_Timer*'
```
<details>

### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-79bf876e-b425-462f-b609-65fc2b0ace5c42b2a125a7444a499/2be065f9-dad3-44ca-baa7-4d2b07c46f9c.zip?sv=2021-08-06&se=2022-12-31T17%3A50%3A09Z&sr=c&sp=rl&sig=L0AEnlaQzTKcQnpIWH4bGOPoV7yOfq5CfXifbEcdpOU%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-670af7a6-a083-4617-be39-d0ceb3fd5475defb790207947598f/9912d152-f323-49af-b705-5b29c332cf35.zip?sv=2021-08-06&se=2023-01-01T12%3A15%3A55Z&sr=c&sp=rl&sig=wpfsVQZMu14xpmFzI%2BkXPVOkNbnU5g5EED1MV28K9Q4%3D>)
### Histogram

#### System.Threading.Tests.Perf_Timer.ScheduleManyThenDisposeMany

```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 779.496296 > 631.6900120588236.
IsChangePoint: Marked as a change because one of 12/1/2022 7:29:59 PM, 12/8/2022 3:49:24 AM falls between 11/29/2022 2:55:01 PM and 12/8/2022 3:49:24 AM.
IsRegressionStdDev: Marked as regression because -27.275364789733967 (T) = (0 -760402180.7058823) / Math.Sqrt((287760363016342.4 / (18)) + (291508008401776.56 / (17))) is less than -2.034515297446192 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (18) + (17) - 2, .025) and -0.2601983022924083 = (603398829.6307381 - 760402180.7058823) / 603398829.6307381 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 | [aa8fe36e105a1c0498c733b69685b12f820175df](https://github.com/dotnet/runtime/commit/aa8fe36e105a1c0498c733b69685b12f820175df)
Compare | [843441ecc0831b0621bdf7561e73c5d77cd4301b](https://github.com/dotnet/runtime/commit/843441ecc0831b0621bdf7561e73c5d77cd4301b)
Diff | [Diff](https://github.com/dotnet/runtime/compare/aa8fe36e105a1c0498c733b69685b12f820175df...843441ecc0831b0621bdf7561e73c5d77cd4301b)


### Regressions in System.Tests.Perf_UInt32

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio | Baseline ETL | Compare ETL
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[ToString - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_Windows 10.0.25094/System.Tests.Perf_UInt32.ToString(value%3a%200).html>) | 2.54 ns | 4.42 ns | 1.74 | 0.90 | False | | |

![graph](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/12_08_2022/refs/heads/main_arm64_Windows%2010.0.25094_Regression/System.Tests.Perf_UInt32_1.png>)
[Test Report](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/12_08_2022/refs/heads/main_arm64_Windows%2010.0.25094_Regression/System.Tests.Perf_UInt32.html>)

### Repro

```cmd
git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Tests.Perf_UInt32*'
```
<details>

### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-79bf876e-b425-462f-b609-65fc2b0ace5c42b2a125a7444a499/2be065f9-dad3-44ca-baa7-4d2b07c46f9c.zip?sv=2021-08-06&se=2022-12-31T17%3A50%3A09Z&sr=c&sp=rl&sig=L0AEnlaQzTKcQnpIWH4bGOPoV7yOfq5CfXifbEcdpOU%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-670af7a6-a083-4617-be39-d0ceb3fd5475defb790207947598f/9912d152-f323-49af-b705-5b29c332cf35.zip?sv=2021-08-06&se=2023-01-01T12%3A15%3A55Z&sr=c&sp=rl&sig=wpfsVQZMu14xpmFzI%2BkXPVOkNbnU5g5EED1MV28K9Q4%3D>)
### Histogram

#### System.Tests.Perf_UInt32.ToString(value: 0)

```log

```
### Description of detection logic
```IsRegressionBase: Marked as regression because the compare was 5% greater than the baseline, and the value was not too small.
IsRegressionChecked: Marked as regression because the three check build points were 0.05 greater than the baseline.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
IsRegressionBase: Marked as regression because the compare was 5% greater than the baseline, and the value was not too small.
IsRegressionChecked: Marked as regression because the three check build points were 0.05 greater than the baseline.
IsRegressionWindowed: Marked as regression because 4.421718289376452 > 2.6488778258769807.
IsChangePoint: Marked as a change because one of 10/3/2022 4:48:37 PM, 12/1/2022 7:29:59 PM, 12/8/2022 3:49:24 AM falls between 11/29/2022 2:55:01 PM and 12/8/2022 3:49:24 AM.
IsRegressionStdDev: Marked as regression because -11.30156067733412 (T) = (0 -4.295665548960617) / Math.Sqrt((0.3113295496751816 / (18)) + (0.2531362416139169 / (17))) is less than -2.034515297446192 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (18) + (17) - 2, .025) and -0.8939492296978264 = (2.2680996309737282 - 4.295665548960617) / 2.2680996309737282 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 | [aa8fe36e105a1c0498c733b69685b12f820175df](https://github.com/dotnet/runtime/commit/aa8fe36e105a1c0498c733b69685b12f820175df)
Compare | [843441ecc0831b0621bdf7561e73c5d77cd4301b](https://github.com/dotnet/runtime/commit/843441ecc0831b0621bdf7561e73c5d77cd4301b)
Diff | [Diff](https://github.com/dotnet/runtime/compare/aa8fe36e105a1c0498c733b69685b12f820175df...843441ecc0831b0621bdf7561e73c5d77cd4301b)


### Regressions in System.Tests.Perf_UInt64

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio | Baseline ETL | Compare ETL
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[ToString - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_Windows 10.0.25094/System.Tests.Perf_UInt64.ToString(value%3a%200).html>) | 2.33 ns | 5.05 ns | 2.17 | 0.84 | False | | |

![graph](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/12_08_2022/refs/heads/main_arm64_Windows%2010.0.25094_Regression/System.Tests.Perf_UInt64_1.png>)
[Test Report](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/12_08_2022/refs/heads/main_arm64_Windows%2010.0.25094_Regression/System.Tests.Perf_UInt64.html>)

### Repro

```cmd
git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Tests.Perf_UInt64*'
```
<details>

### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-79bf876e-b425-462f-b609-65fc2b0ace5c42b2a125a7444a499/2be065f9-dad3-44ca-baa7-4d2b07c46f9c.zip?sv=2021-08-06&se=2022-12-31T17%3A50%3A09Z&sr=c&sp=rl&sig=L0AEnlaQzTKcQnpIWH4bGOPoV7yOfq5CfXifbEcdpOU%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-670af7a6-a083-4617-be39-d0ceb3fd5475defb790207947598f/9912d152-f323-49af-b705-5b29c332cf35.zip?sv=2021-08-06&se=2023-01-01T12%3A15%3A55Z&sr=c&sp=rl&sig=wpfsVQZMu14xpmFzI%2BkXPVOkNbnU5g5EED1MV28K9Q4%3D>)
### Histogram

#### System.Tests.Perf_UInt64.ToString(value: 0)

```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 5.051131508520759 > 2.868795317741063.
IsChangePoint: Marked as a change because one of 9/12/2022 8:20:58 PM, 10/3/2022 10:42:38 PM, 12/1/2022 7:29:59 PM, 12/8/2022 3:49:24 AM falls between 11/29/2022 2:55:01 PM and 12/8/2022 3:49:24 AM.
IsRegressionStdDev: Marked as regression because -11.318325125981792 (T) = (0 -4.894545995643823) / Math.Sqrt((0.16085245528718428 / (18)) + (0.5745113894330254 / (17))) is less than -2.034515297446192 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (18) + (17) - 2, .025) and -0.9157635919576466 = (2.554879952928989 - 4.894545995643823) / 2.554879952928989 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.Threading.Tests.Perf_Timer #79409

Run Information