[Perf] Linux/x64: 7 Regressions on 12/11/2022 2:11:02 PM

### Run Information

Architecture | x64
-- | --
OS | ubuntu 18.04
Baseline | [d0a1ad2a7b6363bf68a6346efa3c9754f2711970](https://github.com/dotnet/runtime/commit/d0a1ad2a7b6363bf68a6346efa3c9754f2711970)
Compare | [cfdf0f67485ae41f4454a687b1e01ccb32e5e799](https://github.com/dotnet/runtime/commit/cfdf0f67485ae41f4454a687b1e01ccb32e5e799)
Diff | [Diff](https://github.com/dotnet/runtime/compare/d0a1ad2a7b6363bf68a6346efa3c9754f2711970...cfdf0f67485ae41f4454a687b1e01ccb32e5e799)


### 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
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[ctor_string - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 18.04_LLVM=false_MonoAOT=false_MonoInterpreter=true/System.Text.Tests.Perf_StringBuilder.ctor_string(length%3a%20100).html>) | 266.15 ns | 302.71 ns | 1.14 | 0.03 | False | | |
[ctor_capacity - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 18.04_LLVM=false_MonoAOT=false_MonoInterpreter=true/System.Text.Tests.Perf_StringBuilder.ctor_capacity(length%3a%20100).html>) | 139.13 ns | 154.88 ns | 1.11 | 0.07 | False | | |

[Test Report](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/12_13_2022/refs/heads/main_x64_ubuntu%2018.04_LLVM=false_MonoAOT=false_MonoInterpreter=true_Regression/System.Text.Tests.Perf_StringBuilder.html>)

### Repro

```cmd
git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Text.Tests.Perf_StringBuilder*'
```
<details>

### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-68da93f2-a75b-489c-a9dd-1715b3ce29f22a32e2d4f7a4b98b9/6d74fac4-8ddb-42d7-be97-3b8e949b39bb.zip?sv=2021-08-06&se=2023-01-09T22%3A17%3A05Z&sr=c&sp=rl&sig=bBUDBaglpbvFBoKh%2FIvwOsuOX6nKkyteiECxMGjsFN8%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-810d2cf4-7884-4cc9-a571-6b9886780a68c4833c37d344c0387/be004cfd-6106-4802-a125-c5ca7fa21d90.zip?sv=2021-08-06&se=2023-01-11T01%3A20%3A10Z&sr=c&sp=rl&sig=yOFyH7YLtBExJJSQk5sCCycm4jbFhLioqm1adPEpci4%3D>)
### Histogram

#### System.Text.Tests.Perf_StringBuilder.ctor_string(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 302.70722940489685 > 281.68682770926114.
IsChangePoint: Marked as a change because one of 11/9/2022 12:33:05 PM, 12/3/2022 2:55:34 AM, 12/10/2022 11:25:25 PM, 12/13/2022 2:17:54 AM falls between 12/4/2022 6:53:17 AM and 12/13/2022 2:17:54 AM.
IsRegressionStdDev: Marked as regression because -3.539056613080661 (T) = (0 -293.4867167865786) / Math.Sqrt((376.89353950198995 / (50)) + (159.82589452938768 / (8))) is less than -2.0032407188469383 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (50) + (8) - 2, .025) and -0.06752599941751249 = (274.9223128492584 - 293.4867167865786) / 274.9223128492584 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.Tests.Perf_StringBuilder.ctor_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 154.87664426923203 > 140.44646051884087.
IsChangePoint: Marked as a change because one of 11/15/2022 5:29:43 PM, 12/2/2022 5:21:30 AM, 12/10/2022 11:25:25 PM, 12/13/2022 2:17:54 AM falls between 12/4/2022 6:53:17 AM and 12/13/2022 2:17:54 AM.
IsRegressionStdDev: Marked as regression because -14.120489701362283 (T) = (0 -155.87677184521672) / Math.Sqrt((6.1196510690500014 / (50)) + (15.980723966488073 / (8))) is less than -2.0032407188469383 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (50) + (8) - 2, .025) and -0.1519369106908859 = (135.31710842716902 - 155.87677184521672) / 135.31710842716902 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 | ubuntu 18.04
Baseline | [d0a1ad2a7b6363bf68a6346efa3c9754f2711970](https://github.com/dotnet/runtime/commit/d0a1ad2a7b6363bf68a6346efa3c9754f2711970)
Compare | [cfdf0f67485ae41f4454a687b1e01ccb32e5e799](https://github.com/dotnet/runtime/commit/cfdf0f67485ae41f4454a687b1e01ccb32e5e799)
Diff | [Diff](https://github.com/dotnet/runtime/compare/d0a1ad2a7b6363bf68a6346efa3c9754f2711970...cfdf0f67485ae41f4454a687b1e01ccb32e5e799)


### Regressions in System.Tests.Perf_Random

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio | Baseline ETL | Compare ETL
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[Next_int_unseeded - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 18.04_LLVM=false_MonoAOT=false_MonoInterpreter=true/System.Tests.Perf_Random.Next_int_unseeded.html>) | 144.29 ns | 154.80 ns | 1.07 | 0.15 | False | | |
[Next_int - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 18.04_LLVM=false_MonoAOT=false_MonoInterpreter=true/System.Tests.Perf_Random.Next_int.html>) | 83.66 ns | 95.03 ns | 1.14 | 0.15 | False | | |

[Test Report](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/12_13_2022/refs/heads/main_x64_ubuntu%2018.04_LLVM=false_MonoAOT=false_MonoInterpreter=true_Regression/System.Tests.Perf_Random.html>)

### Repro

```cmd
git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Tests.Perf_Random*'
```
<details>

### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-68da93f2-a75b-489c-a9dd-1715b3ce29f22a32e2d4f7a4b98b9/6d74fac4-8ddb-42d7-be97-3b8e949b39bb.zip?sv=2021-08-06&se=2023-01-09T22%3A17%3A05Z&sr=c&sp=rl&sig=bBUDBaglpbvFBoKh%2FIvwOsuOX6nKkyteiECxMGjsFN8%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-810d2cf4-7884-4cc9-a571-6b9886780a68c4833c37d344c0387/be004cfd-6106-4802-a125-c5ca7fa21d90.zip?sv=2021-08-06&se=2023-01-11T01%3A20%3A10Z&sr=c&sp=rl&sig=yOFyH7YLtBExJJSQk5sCCycm4jbFhLioqm1adPEpci4%3D>)
### Histogram

#### System.Tests.Perf_Random.Next_int_unseeded

```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 154.8002019210073 > 148.68770389385432.
IsChangePoint: Marked as a change because one of 10/12/2022 11:17:15 AM, 11/15/2022 8:48:03 PM, 12/2/2022 2:38:36 AM, 12/10/2022 11:25:25 PM, 12/13/2022 2:17:54 AM falls between 12/4/2022 6:53:17 AM and 12/13/2022 2:17:54 AM.
IsRegressionStdDev: Marked as regression because -8.23705883114742 (T) = (0 -156.02817803647324) / Math.Sqrt((15.5969647820477 / (50)) + (13.077857982450045 / (8))) is less than -2.0032407188469383 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (50) + (8) - 2, .025) and -0.07951402932122628 = (144.53557230245556 - 156.02817803647324) / 144.53557230245556 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_Random.Next_int

```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 95.03474177871958 > 87.15511640308564.
IsChangePoint: Marked as a change because one of 11/15/2022 8:48:03 PM, 12/2/2022 5:21:30 AM, 12/10/2022 11:25:25 PM, 12/13/2022 2:17:54 AM falls between 12/4/2022 6:53:17 AM and 12/13/2022 2:17:54 AM.
IsRegressionStdDev: Marked as regression because -7.229688622162542 (T) = (0 -91.10217203871278) / Math.Sqrt((7.441373556492987 / (50)) + (11.6228926740883 / (8))) is less than -2.0032407188469383 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (50) + (8) - 2, .025) and -0.11164694509064729 = (81.95243322625603 - 91.10217203871278) / 81.95243322625603 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 | ubuntu 18.04
Baseline | [d0a1ad2a7b6363bf68a6346efa3c9754f2711970](https://github.com/dotnet/runtime/commit/d0a1ad2a7b6363bf68a6346efa3c9754f2711970)
Compare | [cfdf0f67485ae41f4454a687b1e01ccb32e5e799](https://github.com/dotnet/runtime/commit/cfdf0f67485ae41f4454a687b1e01ccb32e5e799)
Diff | [Diff](https://github.com/dotnet/runtime/compare/d0a1ad2a7b6363bf68a6346efa3c9754f2711970...cfdf0f67485ae41f4454a687b1e01ccb32e5e799)


### Regressions in System.Collections.CtorGivenSizeNonGeneric

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio | Baseline ETL | Compare ETL
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[Queue - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 18.04_LLVM=false_MonoAOT=false_MonoInterpreter=true/System.Collections.CtorGivenSizeNonGeneric.Queue(Size%3a%20512).html>) | 333.70 ns | 373.57 ns | 1.12 | 0.06 | False | | |

[Test Report](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/12_13_2022/refs/heads/main_x64_ubuntu%2018.04_LLVM=false_MonoAOT=false_MonoInterpreter=true_Regression/System.Collections.CtorGivenSizeNonGeneric.html>)

### Repro

```cmd
git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Collections.CtorGivenSizeNonGeneric*'
```
<details>

### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-68da93f2-a75b-489c-a9dd-1715b3ce29f22a32e2d4f7a4b98b9/6d74fac4-8ddb-42d7-be97-3b8e949b39bb.zip?sv=2021-08-06&se=2023-01-09T22%3A17%3A05Z&sr=c&sp=rl&sig=bBUDBaglpbvFBoKh%2FIvwOsuOX6nKkyteiECxMGjsFN8%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-810d2cf4-7884-4cc9-a571-6b9886780a68c4833c37d344c0387/be004cfd-6106-4802-a125-c5ca7fa21d90.zip?sv=2021-08-06&se=2023-01-11T01%3A20%3A10Z&sr=c&sp=rl&sig=yOFyH7YLtBExJJSQk5sCCycm4jbFhLioqm1adPEpci4%3D>)
### Histogram

#### System.Collections.CtorGivenSizeNonGeneric.Queue(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 373.5733747842816 > 352.2351794534928.
IsChangePoint: Marked as a change because one of 11/17/2022 4:58:45 AM, 12/10/2022 11:25:25 PM, 12/13/2022 2:17:54 AM falls between 12/4/2022 6:53:17 AM and 12/13/2022 2:17:54 AM.
IsRegressionStdDev: Marked as regression because -36.23606847478164 (T) = (0 -374.9997248543027) / Math.Sqrt((35.68562305212292 / (50)) + (5.431972813048347 / (8))) is less than -2.0032407188469383 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (50) + (8) - 2, .025) and -0.12871348093271726 = (332.2364188867666 - 374.9997248543027) / 332.2364188867666 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 | ubuntu 18.04
Baseline | [d0a1ad2a7b6363bf68a6346efa3c9754f2711970](https://github.com/dotnet/runtime/commit/d0a1ad2a7b6363bf68a6346efa3c9754f2711970)
Compare | [cfdf0f67485ae41f4454a687b1e01ccb32e5e799](https://github.com/dotnet/runtime/commit/cfdf0f67485ae41f4454a687b1e01ccb32e5e799)
Diff | [Diff](https://github.com/dotnet/runtime/compare/d0a1ad2a7b6363bf68a6346efa3c9754f2711970...cfdf0f67485ae41f4454a687b1e01ccb32e5e799)


### Regressions in System.Collections.CtorDefaultSizeNonGeneric

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio | Baseline ETL | Compare ETL
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[Queue - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 18.04_LLVM=false_MonoAOT=false_MonoInterpreter=true/System.Collections.CtorDefaultSizeNonGeneric.Queue.html>) | 131.68 ns | 174.45 ns | 1.32 | 0.08 | False | | |
[Hashtable - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 18.04_LLVM=false_MonoAOT=false_MonoInterpreter=true/System.Collections.CtorDefaultSizeNonGeneric.Hashtable.html>) | 123.41 ns | 135.62 ns | 1.10 | 0.06 | False | | |

[Test Report](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/12_13_2022/refs/heads/main_x64_ubuntu%2018.04_LLVM=false_MonoAOT=false_MonoInterpreter=true_Regression/System.Collections.CtorDefaultSizeNonGeneric.html>)

### Repro

```cmd
git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Collections.CtorDefaultSizeNonGeneric*'
```
<details>

### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-68da93f2-a75b-489c-a9dd-1715b3ce29f22a32e2d4f7a4b98b9/6d74fac4-8ddb-42d7-be97-3b8e949b39bb.zip?sv=2021-08-06&se=2023-01-09T22%3A17%3A05Z&sr=c&sp=rl&sig=bBUDBaglpbvFBoKh%2FIvwOsuOX6nKkyteiECxMGjsFN8%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-810d2cf4-7884-4cc9-a571-6b9886780a68c4833c37d344c0387/be004cfd-6106-4802-a125-c5ca7fa21d90.zip?sv=2021-08-06&se=2023-01-11T01%3A20%3A10Z&sr=c&sp=rl&sig=yOFyH7YLtBExJJSQk5sCCycm4jbFhLioqm1adPEpci4%3D>)
### Histogram

#### System.Collections.CtorDefaultSizeNonGeneric.Queue

```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 174.45280287747184 > 136.61023355862744.
IsChangePoint: Marked as a change because one of 12/10/2022 11:25:25 PM, 12/13/2022 2:17:54 AM falls between 12/4/2022 6:53:17 AM and 12/13/2022 2:17:54 AM.
IsRegressionStdDev: Marked as regression because -40.91559679811722 (T) = (0 -170.90649085293063) / Math.Sqrt((4.949346711821823 / (50)) + (7.115001059125946 / (8))) is less than -2.0032407188469383 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (50) + (8) - 2, .025) and -0.3123467275033625 = (130.22967731863585 - 170.90649085293063) / 130.22967731863585 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.Collections.CtorDefaultSizeNonGeneric.Hashtable

```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 135.61752535817428 > 130.09362569212945.
IsChangePoint: Marked as a change because one of 11/15/2022 8:48:03 PM, 12/11/2022 2:11:02 PM, 12/13/2022 2:17:54 AM falls between 12/4/2022 6:53:17 AM and 12/13/2022 2:17:54 AM.
IsRegressionStdDev: Marked as regression because -12.736432008276347 (T) = (0 -132.76898269677437) / Math.Sqrt((5.269002748669535 / (51)) + (2.146359250513268 / (7))) is less than -2.0032407188469383 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (51) + (7) - 2, .025) and -0.065439224718225 = (124.61431831730015 - 132.76898269677437) / 124.61431831730015 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	x64
OS	ubuntu 18.04
Baseline	d0a1ad2a7b6363bf68a6346efa3c9754f2711970
Compare	cfdf0f67485ae41f4454a687b1e01ccb32e5e799
Diff	Diff

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio	Baseline ETL	Compare ETL
ctor_string - Duration of single invocation	266.15 ns	302.71 ns	1.14	0.03	False
ctor_capacity - Duration of single invocation	139.13 ns	154.88 ns	1.11	0.07	False

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio	Baseline ETL	Compare ETL
Next_int_unseeded - Duration of single invocation	144.29 ns	154.80 ns	1.07	0.15	False
Next_int - Duration of single invocation	83.66 ns	95.03 ns	1.14	0.15	False

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio	Baseline ETL	Compare ETL
Queue - Duration of single invocation	131.68 ns	174.45 ns	1.32	0.08	False
Hashtable - Duration of single invocation	123.41 ns	135.62 ns	1.10	0.06	False

Uh oh!

[Perf] Linux/x64: 7 Regressions on 12/11/2022 2:11:02 PM #79606

Description

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Regressions in System.Text.Tests.Perf_StringBuilder

Repro

Payloads

Histogram

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

Description of detection logic

Description of detection logic

Docs

Regressions in System.Tests.Perf_Random

Repro

Payloads

Histogram

System.Tests.Perf_Random.Next_int_unseeded

Description of detection logic

Description of detection logic

Docs

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Regressions in System.Collections.CtorGivenSizeNonGeneric

Repro

Payloads

Histogram

System.Collections.CtorGivenSizeNonGeneric.Queue(Size: 512)

Description of detection logic

Docs

Run Information

Regressions in System.Collections.CtorDefaultSizeNonGeneric

Repro

Payloads

Histogram

System.Collections.CtorDefaultSizeNonGeneric.Queue

Description of detection logic

Description of detection logic

Docs

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