Regressions from recent change in Enumerable/String 

### Run Information

Architecture | x64
-- | --
OS | Windows 10.0.18362
Baseline | [215c328e039b3a6b6bfdc6514253307105f25816](https://github.com/dotnet/runtime/commit/215c328e039b3a6b6bfdc6514253307105f25816)
Compare | [ca6716a658137b55d29b3ce100d5d14eb0edd67e](https://github.com/dotnet/runtime/commit/ca6716a658137b55d29b3ce100d5d14eb0edd67e)
Diff | [Diff](https://github.com/dotnet/runtime/compare/215c328e039b3a6b6bfdc6514253307105f25816...ca6716a658137b55d29b3ce100d5d14eb0edd67e)


### Regressions in PerfLabTests.LowLevelPerf

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio | Baseline ETL | Compare ETL
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[InterfaceInterfaceMethodLongHierarchy - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_x64_Windows 10.0.18362_PGOType=fullpgo/PerfLabTests.LowLevelPerf.InterfaceInterfaceMethodLongHierarchy.html>) | 343.02 μs | 434.44 μs | 1.27 | 0.05 | False | | |

![graph](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/02_08_2022/refs/heads/main_x64_Windows%2010.0.18362_PGOType=fullpgo_Regression/PerfLabTests.LowLevelPerf_1.png>)
[Test Report](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/02_08_2022/refs/heads/main_x64_Windows%2010.0.18362_PGOType=fullpgo_Regression/PerfLabTests.LowLevelPerf.html>)

### Repro

```cmd
git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_ci.py -f net6.0 --filter 'PerfLabTests.LowLevelPerf*'
```
<details>

### Payloads

[Baseline](<https://helixdi8s23ayyeko0k025g8.blob.core.windows.net/helix-job-245adc27-12e3-46d5-82d6-46d02690f525b6fa6057c0c4aef82/f1fe06cc-d1c7-4f25-9e2d-8880904d9b00.zip?sv=2019-07-07&se=2022-03-02T10%3A20%3A19Z&sr=c&sp=rl&sig=taXaun%2BOeeDsOhgg8AUOsC%2FXkfy%2BzC49kjEyoRHDa8c%3D>)
[Compare](<https://helixdi8s23ayyeko0k025g8.blob.core.windows.net/helix-job-999fa987-c737-4a96-b87e-fdbf49965844f8fcb1520a8465791/3af615a2-cf98-4678-b438-6140fffba6cd.zip?sv=2019-07-07&se=2022-03-02T21%3A08%3A14Z&sr=c&sp=rl&sig=6s9pf4hz0pSB1Wj8VRLRNfM%2F9Ni9jtUUSYYJckMbGBA%3D>)
### Histogram

#### PerfLabTests.LowLevelPerf.InterfaceInterfaceMethodLongHierarchy

```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 434.43776620370363 > 360.16713994565214.
IsChangePoint: Marked as a change because one of 12/3/2021 12:15:47 AM, 12/26/2021 4:30:45 AM, 1/28/2022 6:30:08 PM, 1/31/2022 1:37:35 PM, 2/8/2022 5:50:06 AM falls between 1/30/2022 5:09:41 PM and 2/8/2022 5:50:06 AM.
IsRegressionStdDev: Marked as regression because -7.992472074571784 (T) = (0 -426668.4222380961) / Math.Sqrt((965734216.7506899 / (22)) + (492133022.74529207 / (52))) is less than -1.9934635666612892 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (22) + (52) - 2, .025) and -0.15852951931967613 = (368284.4632984827 - 426668.4222380961) / 368284.4632984827 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 | x64
-- | --
OS | Windows 10.0.18362
Baseline | [215c328e039b3a6b6bfdc6514253307105f25816](https://github.com/dotnet/runtime/commit/215c328e039b3a6b6bfdc6514253307105f25816)
Compare | [ca6716a658137b55d29b3ce100d5d14eb0edd67e](https://github.com/dotnet/runtime/commit/ca6716a658137b55d29b3ce100d5d14eb0edd67e)
Diff | [Diff](https://github.com/dotnet/runtime/compare/215c328e039b3a6b6bfdc6514253307105f25816...ca6716a658137b55d29b3ce100d5d14eb0edd67e)


### Regressions in System.Linq.Tests.Perf_Enumerable

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio | Baseline ETL | Compare ETL
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[Min - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_x64_Windows 10.0.18362_PGOType=fullpgo/System.Linq.Tests.Perf_Enumerable.Min(input%3a%20IEnumerable).html>) | 222.48 ns | 239.27 ns | 1.08 | 0.07 | False | | |
[WhereAny_LastElementMatches - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_x64_Windows 10.0.18362_PGOType=fullpgo/System.Linq.Tests.Perf_Enumerable.WhereAny_LastElementMatches(input%3a%20Array).html>) | 258.96 ns | 285.18 ns | 1.10 | 0.09 | False | | |

![graph](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/02_08_2022/refs/heads/main_x64_Windows%2010.0.18362_PGOType=fullpgo_Regression/System.Linq.Tests.Perf_Enumerable_1.png>)
![graph](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/02_08_2022/refs/heads/main_x64_Windows%2010.0.18362_PGOType=fullpgo_Regression/System.Linq.Tests.Perf_Enumerable_2.png>)
[Test Report](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/02_08_2022/refs/heads/main_x64_Windows%2010.0.18362_PGOType=fullpgo_Regression/System.Linq.Tests.Perf_Enumerable.html>)

### Repro

```cmd
git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_ci.py -f net6.0 --filter 'System.Linq.Tests.Perf_Enumerable*'
```
<details>

### Payloads

[Baseline](<https://helixdi8s23ayyeko0k025g8.blob.core.windows.net/helix-job-245adc27-12e3-46d5-82d6-46d02690f525b6fa6057c0c4aef82/f1fe06cc-d1c7-4f25-9e2d-8880904d9b00.zip?sv=2019-07-07&se=2022-03-02T10%3A20%3A19Z&sr=c&sp=rl&sig=taXaun%2BOeeDsOhgg8AUOsC%2FXkfy%2BzC49kjEyoRHDa8c%3D>)
[Compare](<https://helixdi8s23ayyeko0k025g8.blob.core.windows.net/helix-job-999fa987-c737-4a96-b87e-fdbf49965844f8fcb1520a8465791/3af615a2-cf98-4678-b438-6140fffba6cd.zip?sv=2019-07-07&se=2022-03-02T21%3A08%3A14Z&sr=c&sp=rl&sig=6s9pf4hz0pSB1Wj8VRLRNfM%2F9Ni9jtUUSYYJckMbGBA%3D>)
### Histogram

#### System.Linq.Tests.Perf_Enumerable.Min(input: IEnumerable)

```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 239.27208808510542 > 233.7122841434742.
IsChangePoint: Marked as a change because one of 1/31/2022 1:37:35 PM, 2/8/2022 5:50:06 AM falls between 1/30/2022 5:09:41 PM and 2/8/2022 5:50:06 AM.
IsRegressionStdDev: Marked as regression because -12.826789876065815 (T) = (0 -234.1997613536838) / Math.Sqrt((0.8492934570542772 / (22)) + (42.165541206139075 / (52))) is less than -1.9934635666612892 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (22) + (52) - 2, .025) and -0.05316225669485286 = (222.3776629525964 - 234.1997613536838) / 222.3776629525964 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.Linq.Tests.Perf_Enumerable.WhereAny_LastElementMatches(input: Array)

```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 285.1834081591006 > 271.80694088092423.
IsChangePoint: Marked as a change because one of 12/2/2021 8:37:26 PM, 12/7/2021 12:20:12 AM, 12/8/2021 6:13:42 AM, 12/17/2021 7:05:08 PM, 2/7/2022 2:49:00 PM, 2/8/2022 5:50:06 AM falls between 1/30/2022 5:09:41 PM and 2/8/2022 5:50:06 AM.
IsRegressionStdDev: Marked as regression because -30.337380283490962 (T) = (0 -285.0143803057061) / Math.Sqrt((39.02563193166371 / (71)) + (0.07871479182178301 / (3))) is less than -1.9934635666612892 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (71) + (3) - 2, .025) and -0.08787425924788754 = (261.9920251654392 - 285.0143803057061) / 261.9920251654392 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 | x64
-- | --
OS | Windows 10.0.18362
Baseline | [215c328e039b3a6b6bfdc6514253307105f25816](https://github.com/dotnet/runtime/commit/215c328e039b3a6b6bfdc6514253307105f25816)
Compare | [ca6716a658137b55d29b3ce100d5d14eb0edd67e](https://github.com/dotnet/runtime/commit/ca6716a658137b55d29b3ce100d5d14eb0edd67e)
Diff | [Diff](https://github.com/dotnet/runtime/compare/215c328e039b3a6b6bfdc6514253307105f25816...ca6716a658137b55d29b3ce100d5d14eb0edd67e)


### Regressions in System.Collections.IterateForEach&lt;Int32&gt;

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio | Baseline ETL | Compare ETL
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[ImmutableHashSet - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_x64_Windows 10.0.18362_PGOType=fullpgo/System.Collections.IterateForEach(Int32).ImmutableHashSet(Size%3a%20512).html>) | 15.93 μs | 20.77 μs | 1.30 | 0.02 | True | | |

![graph](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/02_08_2022/refs/heads/main_x64_Windows%2010.0.18362_PGOType=fullpgo_Regression/System.Collections.IterateForEach(Int32)_1.png>)
[Test Report](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/02_08_2022/refs/heads/main_x64_Windows%2010.0.18362_PGOType=fullpgo_Regression/System.Collections.IterateForEach(Int32).html>)

### Repro

```cmd
git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_ci.py -f net6.0 --filter 'System.Collections.IterateForEach&lt;Int32&gt;*'
```
<details>

### Payloads

[Baseline](<https://helixdi8s23ayyeko0k025g8.blob.core.windows.net/helix-job-245adc27-12e3-46d5-82d6-46d02690f525b6fa6057c0c4aef82/f1fe06cc-d1c7-4f25-9e2d-8880904d9b00.zip?sv=2019-07-07&se=2022-03-02T10%3A20%3A19Z&sr=c&sp=rl&sig=taXaun%2BOeeDsOhgg8AUOsC%2FXkfy%2BzC49kjEyoRHDa8c%3D>)
[Compare](<https://helixdi8s23ayyeko0k025g8.blob.core.windows.net/helix-job-999fa987-c737-4a96-b87e-fdbf49965844f8fcb1520a8465791/3af615a2-cf98-4678-b438-6140fffba6cd.zip?sv=2019-07-07&se=2022-03-02T21%3A08%3A14Z&sr=c&sp=rl&sig=6s9pf4hz0pSB1Wj8VRLRNfM%2F9Ni9jtUUSYYJckMbGBA%3D>)
### Histogram

#### System.Collections.IterateForEach&lt;Int32&gt;.ImmutableHashSet(Size: 512)

```log

```
### Description of detection logic
```IsRegressionBase: Marked as regression because the compare was 5% greater than the baseline, and the value was not too small.
IsRegressionChecked: Marked as regression because the three check build points were 0.05 greater than the baseline.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
IsRegressionBase: Marked as regression because the compare was 5% greater than the baseline, and the value was not too small.
IsRegressionChecked: Marked as regression because the three check build points were 0.05 greater than the baseline.
IsRegressionWindowed: Marked as regression because 20.76785312640576 > 16.658499762854014.
IsChangePoint: Marked as a change because one of 1/31/2022 1:37:35 PM, 2/8/2022 5:50:06 AM falls between 1/30/2022 5:09:41 PM and 2/8/2022 5:50:06 AM.
IsRegressionStdDev: Marked as regression because -104.9294748860685 (T) = (0 -21051.73394744585) / Math.Sqrt((19881.098816749425 / (22)) + (76796.96306669693 / (52))) is less than -1.9934635666612892 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (22) + (52) - 2, .025) and -0.32133820424881193 = (15932.131440499654 - 21051.73394744585) / 15932.131440499654 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 as 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 | x64
-- | --
OS | Windows 10.0.18362
Baseline | [215c328e039b3a6b6bfdc6514253307105f25816](https://github.com/dotnet/runtime/commit/215c328e039b3a6b6bfdc6514253307105f25816)
Compare | [ca6716a658137b55d29b3ce100d5d14eb0edd67e](https://github.com/dotnet/runtime/commit/ca6716a658137b55d29b3ce100d5d14eb0edd67e)
Diff | [Diff](https://github.com/dotnet/runtime/compare/215c328e039b3a6b6bfdc6514253307105f25816...ca6716a658137b55d29b3ce100d5d14eb0edd67e)


### Regressions in System.Text.Json.Tests.Perf_Basic

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio | Baseline ETL | Compare ETL
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[WriteBasicUtf16 - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_x64_Windows 10.0.18362_PGOType=fullpgo/System.Text.Json.Tests.Perf_Basic.WriteBasicUtf16(Formatted%3a%20False%2c%20SkipValidation%3a%20True%2c%20DataSize%3a%20100000).html>) | 1.44 ms | 1.69 ms | 1.18 | 0.01 | True | | |

![graph](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/02_08_2022/refs/heads/main_x64_Windows%2010.0.18362_PGOType=fullpgo_Regression/System.Text.Json.Tests.Perf_Basic_1.png>)
[Test Report](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/02_08_2022/refs/heads/main_x64_Windows%2010.0.18362_PGOType=fullpgo_Regression/System.Text.Json.Tests.Perf_Basic.html>)

### Repro

```cmd
git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_ci.py -f net6.0 --filter 'System.Text.Json.Tests.Perf_Basic*'
```
<details>

### Payloads

[Baseline](<https://helixdi8s23ayyeko0k025g8.blob.core.windows.net/helix-job-245adc27-12e3-46d5-82d6-46d02690f525b6fa6057c0c4aef82/f1fe06cc-d1c7-4f25-9e2d-8880904d9b00.zip?sv=2019-07-07&se=2022-03-02T10%3A20%3A19Z&sr=c&sp=rl&sig=taXaun%2BOeeDsOhgg8AUOsC%2FXkfy%2BzC49kjEyoRHDa8c%3D>)
[Compare](<https://helixdi8s23ayyeko0k025g8.blob.core.windows.net/helix-job-999fa987-c737-4a96-b87e-fdbf49965844f8fcb1520a8465791/3af615a2-cf98-4678-b438-6140fffba6cd.zip?sv=2019-07-07&se=2022-03-02T21%3A08%3A14Z&sr=c&sp=rl&sig=6s9pf4hz0pSB1Wj8VRLRNfM%2F9Ni9jtUUSYYJckMbGBA%3D>)
### Histogram

#### System.Text.Json.Tests.Perf_Basic.WriteBasicUtf16(Formatted: False, SkipValidation: True, DataSize: 100000)

```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 1.690661756756757 > 1.502581166502463.
IsChangePoint: Marked as a change because one of 1/31/2022 1:37:35 PM, 2/8/2022 5:50:06 AM falls between 1/30/2022 5:09:41 PM and 2/8/2022 5:50:06 AM.
IsRegressionStdDev: Marked as regression because -55.5956689561246 (T) = (0 -1735731.1983655638) / Math.Sqrt((350600548.6628888 / (22)) + (656938221.8443089 / (52))) is less than -1.9934635666612892 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (22) + (52) - 2, .025) and -0.20656855668343535 = (1438568.2344786676 - 1735731.1983655638) / 1438568.2344786676 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 as 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 | x64
-- | --
OS | Windows 10.0.18362
Baseline | [215c328e039b3a6b6bfdc6514253307105f25816](https://github.com/dotnet/runtime/commit/215c328e039b3a6b6bfdc6514253307105f25816)
Compare | [ca6716a658137b55d29b3ce100d5d14eb0edd67e](https://github.com/dotnet/runtime/commit/ca6716a658137b55d29b3ce100d5d14eb0edd67e)
Diff | [Diff](https://github.com/dotnet/runtime/compare/215c328e039b3a6b6bfdc6514253307105f25816...ca6716a658137b55d29b3ce100d5d14eb0edd67e)


### Regressions in System.Text.Tests.Perf_StringBuilder

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio | Baseline ETL | Compare ETL
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[Append_Char_Capacity - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_x64_Windows 10.0.18362_PGOType=fullpgo/System.Text.Tests.Perf_StringBuilder.Append_Char_Capacity(length%3a%20100).html>) | 180.04 ns | 192.01 ns | 1.07 | 0.00 | True | | |

![graph](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/02_08_2022/refs/heads/main_x64_Windows%2010.0.18362_PGOType=fullpgo_Regression/System.Text.Tests.Perf_StringBuilder_1.png>)
[Test Report](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/02_08_2022/refs/heads/main_x64_Windows%2010.0.18362_PGOType=fullpgo_Regression/System.Text.Tests.Perf_StringBuilder.html>)

### Repro

```cmd
git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_ci.py -f net6.0 --filter 'System.Text.Tests.Perf_StringBuilder*'
```
<details>

### Payloads

[Baseline](<https://helixdi8s23ayyeko0k025g8.blob.core.windows.net/helix-job-245adc27-12e3-46d5-82d6-46d02690f525b6fa6057c0c4aef82/f1fe06cc-d1c7-4f25-9e2d-8880904d9b00.zip?sv=2019-07-07&se=2022-03-02T10%3A20%3A19Z&sr=c&sp=rl&sig=taXaun%2BOeeDsOhgg8AUOsC%2FXkfy%2BzC49kjEyoRHDa8c%3D>)
[Compare](<https://helixdi8s23ayyeko0k025g8.blob.core.windows.net/helix-job-999fa987-c737-4a96-b87e-fdbf49965844f8fcb1520a8465791/3af615a2-cf98-4678-b438-6140fffba6cd.zip?sv=2019-07-07&se=2022-03-02T21%3A08%3A14Z&sr=c&sp=rl&sig=6s9pf4hz0pSB1Wj8VRLRNfM%2F9Ni9jtUUSYYJckMbGBA%3D>)
### Histogram

#### System.Text.Tests.Perf_StringBuilder.Append_Char_Capacity(length: 100)

```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 192.0087062413456 > 189.21173907550073.
IsChangePoint: Marked as a change because one of 1/31/2022 1:37:35 PM, 2/8/2022 5:50:06 AM falls between 1/30/2022 5:09:41 PM and 2/8/2022 5:50:06 AM.
IsRegressionStdDev: Marked as regression because -44.315123284896586 (T) = (0 -191.7010662098259) / Math.Sqrt((0.39241636051399265 / (22)) + (2.6694428660464187 / (52))) is less than -1.9934635666612892 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (22) + (52) - 2, .025) and -0.06473447551369219 = (180.0458899551813 - 191.7010662098259) / 180.0458899551813 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 as 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	x64
OS	Windows 10.0.18362
Baseline	215c328e039b3a6b6bfdc6514253307105f25816
Compare	ca6716a658137b55d29b3ce100d5d14eb0edd67e
Diff	Diff

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio	Baseline ETL	Compare ETL
Min - Duration of single invocation	222.48 ns	239.27 ns	1.08	0.07	False
WhereAny_LastElementMatches - Duration of single invocation	258.96 ns	285.18 ns	1.10	0.09	False

Regressions from recent change in Enumerable/String #64992

Description

Run Information

Regressions in PerfLabTests.LowLevelPerf

Repro

Payloads

Histogram

PerfLabTests.LowLevelPerf.InterfaceInterfaceMethodLongHierarchy

Description of detection logic

Docs

Regressions in System.Linq.Tests.Perf_Enumerable

Repro

Payloads

Histogram

System.Linq.Tests.Perf_Enumerable.Min(input: IEnumerable)

Description of detection logic

Description of detection logic

Docs

Run Information

Regressions in System.Collections.IterateForEach<Int32>

Repro

Payloads

Histogram

System.Collections.IterateForEach<Int32>.ImmutableHashSet(Size: 512)

Description of detection logic

Docs

Run Information

Regressions in System.Text.Json.Tests.Perf_Basic

Repro

Payloads

Histogram

System.Text.Json.Tests.Perf_Basic.WriteBasicUtf16(Formatted: False, SkipValidation: True, DataSize: 100000)

Description of detection logic

Docs

Run Information

Regressions in System.Text.Tests.Perf_StringBuilder

Repro

Payloads

Histogram

System.Text.Tests.Perf_StringBuilder.Append_Char_Capacity(length: 100)

Description of detection logic

Docs

Metadata

Metadata

Assignees

Labels

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Development

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