Regressions in System.Buffers.Tests.RentReturnArrayPoolTests<Object>

### Run Information

Architecture | arm64
-- | --
OS | ubuntu 20.04
Baseline | [c9f80fdde29c71ac87971383c77a1a5e665fadb9](https://github.com/dotnet/runtime/commit/c9f80fdde29c71ac87971383c77a1a5e665fadb9)
Compare | [a38b50c3a2f828458d15e68c78460db3ec7e5cda](https://github.com/dotnet/runtime/commit/a38b50c3a2f828458d15e68c78460db3ec7e5cda)
Diff | [Diff](https://github.com/dotnet/runtime/compare/c9f80fdde29c71ac87971383c77a1a5e665fadb9...a38b50c3a2f828458d15e68c78460db3ec7e5cda)


### Regressions in System.Text.Json.Tests.Perf_Deep

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio | Baseline ETL | Compare ETL
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[WriteDeepUtf16 - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Text.Json.Tests.Perf_Deep.WriteDeepUtf16(Formatted%3a%20False%2c%20SkipValidation%3a%20True).html>) | 4.93 ms | 5.29 ms | 1.07 | 0.00 | False | | |
[WriteDeepUtf8 - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Text.Json.Tests.Perf_Deep.WriteDeepUtf8(Formatted%3a%20False%2c%20SkipValidation%3a%20True).html>) | 4.97 ms | 5.26 ms | 1.06 | 0.00 | False | | |
[WriteDeepUtf16 - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Text.Json.Tests.Perf_Deep.WriteDeepUtf16(Formatted%3a%20False%2c%20SkipValidation%3a%20False).html>) | 5.25 ms | 5.55 ms | 1.06 | 0.00 | False | | |

![graph](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/06_30_2022/refs/heads/main_arm64_ubuntu%2020.04_Regression/System.Text.Json.Tests.Perf_Deep_1.png>)
![graph](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/06_30_2022/refs/heads/main_arm64_ubuntu%2020.04_Regression/System.Text.Json.Tests.Perf_Deep_2.png>)
![graph](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/06_30_2022/refs/heads/main_arm64_ubuntu%2020.04_Regression/System.Text.Json.Tests.Perf_Deep_3.png>)
[Test Report](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/06_30_2022/refs/heads/main_arm64_ubuntu%2020.04_Regression/System.Text.Json.Tests.Perf_Deep.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_Deep*'
```
<details>

### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-f020198e-980a-451a-a1da-dd9c6010ae87fa7b87fe231464ba3/81c8b129-9622-4303-aaac-fd8deb0ed14c.zip?sv=2021-06-08&se=2022-07-26T19%3A15%3A16Z&sr=c&sp=rl&sig=SSkOBT%2FmC8JuHrmiwY0QB9Cand5m51M1ssA4PTh1cEw%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-b081332b-1191-4b42-9ad3-d07e405f5567e7626c517a7431b99/f1b87b87-ff84-4487-9de9-d55009f55484.zip?sv=2021-06-08&se=2022-07-27T23%3A17%3A09Z&sr=c&sp=rl&sig=BjgCDFEprLu5tLz2n6eDm7HkAj0MP6BflYJ9Uua9XiA%3D>)
### Histogram

#### System.Text.Json.Tests.Perf_Deep.WriteDeepUtf16(Formatted: False, SkipValidation: True)

```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 5.2924019456521725 > 5.195116339699999.
IsChangePoint: Marked as a change because one of 6/27/2022 8:54:23 AM, 6/30/2022 12:21:07 PM falls between 6/21/2022 9:29:01 PM and 6/30/2022 12:21:07 PM.
IsRegressionStdDev: Marked as regression because -62.883214080844944 (T) = (0 -5271577.21509731) / Math.Sqrt((185315176.39245772 / (32)) + (235544487.6445184 / (12))) is less than -2.0180817028167235 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (32) + (12) - 2, .025) and -0.0639908960754851 = (4954532.25637686 - 5271577.21509731) / 4954532.25637686 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.Json.Tests.Perf_Deep.WriteDeepUtf8(Formatted: False, SkipValidation: True)

```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 5.25883959710145 > 5.171207155182354.
IsChangePoint: Marked as a change because one of 6/27/2022 8:54:23 AM, 6/30/2022 12:21:07 PM falls between 6/21/2022 9:29:01 PM and 6/30/2022 12:21:07 PM.
IsRegressionStdDev: Marked as regression because -58.01295726028566 (T) = (0 -5242644.245942542) / Math.Sqrt((197904450.00905737 / (32)) + (297749108.7652593 / (12))) is less than -2.0180817028167235 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (32) + (12) - 2, .025) and -0.06565223672943832 = (4919657.713132181 - 5242644.245942542) / 4919657.713132181 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.Json.Tests.Perf_Deep.WriteDeepUtf16(Formatted: False, SkipValidation: False)

```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 5.546248321212121 > 5.525902827765958.
IsChangePoint: Marked as a change because one of 6/27/2022 8:54:23 AM, 6/30/2022 12:21:07 PM falls between 6/21/2022 9:29:01 PM and 6/30/2022 12:21:07 PM.
IsRegressionStdDev: Marked as regression because -38.37097812747013 (T) = (0 -5570782.904317904) / Math.Sqrt((269717487.2190087 / (32)) + (695229046.3110473 / (12))) is less than -2.0180817028167235 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (32) + (12) - 2, .025) and -0.059447521740249476 = (5258196.173008486 - 5570782.904317904) / 5258196.173008486 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 | ubuntu 20.04
Baseline | [c9f80fdde29c71ac87971383c77a1a5e665fadb9](https://github.com/dotnet/runtime/commit/c9f80fdde29c71ac87971383c77a1a5e665fadb9)
Compare | [a38b50c3a2f828458d15e68c78460db3ec7e5cda](https://github.com/dotnet/runtime/commit/a38b50c3a2f828458d15e68c78460db3ec7e5cda)
Diff | [Diff](https://github.com/dotnet/runtime/compare/c9f80fdde29c71ac87971383c77a1a5e665fadb9...a38b50c3a2f828458d15e68c78460db3ec7e5cda)


### 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_arm64_ubuntu 20.04/System.Text.Json.Tests.Perf_Basic.WriteBasicUtf16(Formatted%3a%20False%2c%20SkipValidation%3a%20True%2c%20DataSize%3a%20100000).html>) | 2.13 ms | 2.41 ms | 1.13 | 0.00 | False | | |
[WriteBasicUtf8 - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Text.Json.Tests.Perf_Basic.WriteBasicUtf8(Formatted%3a%20False%2c%20SkipValidation%3a%20True%2c%20DataSize%3a%20100000).html>) | 2.12 ms | 2.39 ms | 1.12 | 0.00 | False | | |
[WriteBasicUtf8 - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Text.Json.Tests.Perf_Basic.WriteBasicUtf8(Formatted%3a%20True%2c%20SkipValidation%3a%20True%2c%20DataSize%3a%20100000).html>) | 2.84 ms | 3.09 ms | 1.09 | 0.00 | False | | |
[WriteBasicUtf16 - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Text.Json.Tests.Perf_Basic.WriteBasicUtf16(Formatted%3a%20True%2c%20SkipValidation%3a%20False%2c%20DataSize%3a%20100000).html>) | 3.01 ms | 3.28 ms | 1.09 | 0.00 | False | | |
[WriteBasicUtf16 - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Text.Json.Tests.Perf_Basic.WriteBasicUtf16(Formatted%3a%20False%2c%20SkipValidation%3a%20False%2c%20DataSize%3a%20100000).html>) | 2.28 ms | 2.55 ms | 1.12 | 0.00 | False | | |
[WriteBasicUtf16 - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Text.Json.Tests.Perf_Basic.WriteBasicUtf16(Formatted%3a%20True%2c%20SkipValidation%3a%20True%2c%20DataSize%3a%20100000).html>) | 2.85 ms | 3.12 ms | 1.09 | 0.00 | False | | |
[WriteBasicUtf8 - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Text.Json.Tests.Perf_Basic.WriteBasicUtf8(Formatted%3a%20True%2c%20SkipValidation%3a%20False%2c%20DataSize%3a%20100000).html>) | 3.03 ms | 3.27 ms | 1.08 | 0.00 | False | | |
[WriteBasicUtf8 - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Text.Json.Tests.Perf_Basic.WriteBasicUtf8(Formatted%3a%20False%2c%20SkipValidation%3a%20False%2c%20DataSize%3a%20100000).html>) | 2.27 ms | 2.56 ms | 1.12 | 0.00 | False | | |

![graph](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/06_30_2022/refs/heads/main_arm64_ubuntu%2020.04_Regression/System.Text.Json.Tests.Perf_Basic_1.png>)
![graph](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/06_30_2022/refs/heads/main_arm64_ubuntu%2020.04_Regression/System.Text.Json.Tests.Perf_Basic_2.png>)
![graph](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/06_30_2022/refs/heads/main_arm64_ubuntu%2020.04_Regression/System.Text.Json.Tests.Perf_Basic_3.png>)
![graph](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/06_30_2022/refs/heads/main_arm64_ubuntu%2020.04_Regression/System.Text.Json.Tests.Perf_Basic_4.png>)
![graph](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/06_30_2022/refs/heads/main_arm64_ubuntu%2020.04_Regression/System.Text.Json.Tests.Perf_Basic_5.png>)
![graph](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/06_30_2022/refs/heads/main_arm64_ubuntu%2020.04_Regression/System.Text.Json.Tests.Perf_Basic_6.png>)
![graph](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/06_30_2022/refs/heads/main_arm64_ubuntu%2020.04_Regression/System.Text.Json.Tests.Perf_Basic_7.png>)
![graph](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/06_30_2022/refs/heads/main_arm64_ubuntu%2020.04_Regression/System.Text.Json.Tests.Perf_Basic_8.png>)
[Test Report](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/06_30_2022/refs/heads/main_arm64_ubuntu%2020.04_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://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-f020198e-980a-451a-a1da-dd9c6010ae87fa7b87fe231464ba3/81c8b129-9622-4303-aaac-fd8deb0ed14c.zip?sv=2021-06-08&se=2022-07-26T19%3A15%3A16Z&sr=c&sp=rl&sig=SSkOBT%2FmC8JuHrmiwY0QB9Cand5m51M1ssA4PTh1cEw%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-b081332b-1191-4b42-9ad3-d07e405f5567e7626c517a7431b99/f1b87b87-ff84-4487-9de9-d55009f55484.zip?sv=2021-06-08&se=2022-07-27T23%3A17%3A09Z&sr=c&sp=rl&sig=BjgCDFEprLu5tLz2n6eDm7HkAj0MP6BflYJ9Uua9XiA%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 2.413046492905153 > 2.2323625869395554.
IsChangePoint: Marked as a change because one of 6/27/2022 8:54:23 AM, 6/30/2022 12:21:07 PM falls between 6/21/2022 9:29:01 PM and 6/30/2022 12:21:07 PM.
IsRegressionStdDev: Marked as regression because -345.39885295672553 (T) = (0 -2415661.9224883527) / Math.Sqrt((11466036.577396711 / (32)) + (4055508.360646513 / (12))) is less than -2.0180817028167235 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (32) + (12) - 2, .025) and -0.13547246025008064 = (2127450.913213975 - 2415661.9224883527) / 2127450.913213975 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.Json.Tests.Perf_Basic.WriteBasicUtf8(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 2.3869956682692304 > 2.2289094366944817.
IsChangePoint: Marked as a change because one of 6/27/2022 8:54:23 AM, 6/30/2022 12:21:07 PM falls between 6/21/2022 9:29:01 PM and 6/30/2022 12:21:07 PM.
IsRegressionStdDev: Marked as regression because -152.0413470626112 (T) = (0 -2394699.9200306633) / Math.Sqrt((14084111.144689558 / (32)) + (32800381.06979755 / (12))) is less than -2.0180817028167235 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (32) + (12) - 2, .025) and -0.1275283995121029 = (2123848.87251344 - 2394699.9200306633) / 2123848.87251344 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.Json.Tests.Perf_Basic.WriteBasicUtf8(Formatted: True, 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 3.0888318115226343 > 2.9820909594602276.
IsChangePoint: Marked as a change because one of 6/27/2022 8:54:23 AM, 6/30/2022 12:21:07 PM falls between 6/21/2022 9:29:01 PM and 6/30/2022 12:21:07 PM.
IsRegressionStdDev: Marked as regression because -165.20487949464604 (T) = (0 -3102876.479503347) / Math.Sqrt((9167201.45048848 / (32)) + (26419804.084898308 / (12))) is less than -2.0180817028167235 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (32) + (12) - 2, .025) and -0.09168351763717046 = (2842285.7260125936 - 3102876.479503347) / 2842285.7260125936 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.Json.Tests.Perf_Basic.WriteBasicUtf16(Formatted: True, SkipValidation: False, 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 3.278109338596491 > 3.162077486470761.
IsChangePoint: Marked as a change because one of 6/27/2022 8:54:23 AM, 6/30/2022 12:21:07 PM falls between 6/21/2022 9:29:01 PM and 6/30/2022 12:21:07 PM.
IsRegressionStdDev: Marked as regression because -263.1311054031104 (T) = (0 -3276587.661000043) / Math.Sqrt((1732394.4003758235 / (32)) + (11484271.472290196 / (12))) is less than -2.0180817028167235 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (32) + (12) - 2, .025) and -0.08784726663213838 = (3011992.364648777 - 3276587.661000043) / 3011992.364648777 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.Json.Tests.Perf_Basic.WriteBasicUtf16(Formatted: False, SkipValidation: False, 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 2.5517615633284234 > 2.394371170527523.
IsChangePoint: Marked as a change because one of 6/27/2022 8:54:23 AM, 6/30/2022 12:21:07 PM falls between 6/21/2022 9:29:01 PM and 6/30/2022 12:21:07 PM.
IsRegressionStdDev: Marked as regression because -401.51257075080696 (T) = (0 -2553628.3245032714) / Math.Sqrt((3139674.47373653 / (32)) + (4375365.40976178 / (12))) is less than -2.0180817028167235 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (32) + (12) - 2, .025) and -0.1197654962107207 = (2280502.77771974 - 2553628.3245032714) / 2280502.77771974 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.Json.Tests.Perf_Basic.WriteBasicUtf16(Formatted: True, 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 3.1181703383333335 > 2.9931869454022983.
IsChangePoint: Marked as a change because one of 6/27/2022 8:54:23 AM, 6/30/2022 12:21:07 PM falls between 6/21/2022 9:29:01 PM and 6/30/2022 12:21:07 PM.
IsRegressionStdDev: Marked as regression because -143.7329587356498 (T) = (0 -3112665.3868698566) / Math.Sqrt((5652288.301119157 / (32)) + (37752435.64427367 / (12))) is less than -2.0180817028167235 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (32) + (12) - 2, .025) and -0.09190806637328912 = (2850666.1711991914 - 3112665.3868698566) / 2850666.1711991914 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.Json.Tests.Perf_Basic.WriteBasicUtf8(Formatted: True, SkipValidation: False, 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 3.2734030062222224 > 3.180161731956315.
IsChangePoint: Marked as a change because one of 6/27/2022 8:54:23 AM, 6/30/2022 12:21:07 PM falls between 6/21/2022 9:29:01 PM and 6/30/2022 12:21:07 PM.
IsRegressionStdDev: Marked as regression because -65.035228030537 (T) = (0 -3281967.6176546924) / Math.Sqrt((5025270.405031393 / (32)) + (178131450.1298167 / (12))) is less than -2.0180817028167235 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (32) + (12) - 2, .025) and -0.08313041922842368 = (3030076.119543044 - 3281967.6176546924) / 3030076.119543044 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.Json.Tests.Perf_Basic.WriteBasicUtf8(Formatted: False, SkipValidation: False, 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 2.555302539027982 > 2.38507844843007.
IsChangePoint: Marked as a change because one of 6/27/2022 8:54:23 AM, 6/30/2022 12:21:07 PM falls between 6/21/2022 9:29:01 PM and 6/30/2022 12:21:07 PM.
IsRegressionStdDev: Marked as regression because -351.0938854483454 (T) = (0 -2556497.161926386) / Math.Sqrt((14760943.328055177 / (32)) + (2310805.7294822093 / (12))) is less than -2.0180817028167235 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (32) + (12) - 2, .025) and -0.12492179784800715 = (2272599.8970035114 - 2556497.161926386) / 2272599.8970035114 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 | ubuntu 20.04
Baseline | [c9f80fdde29c71ac87971383c77a1a5e665fadb9](https://github.com/dotnet/runtime/commit/c9f80fdde29c71ac87971383c77a1a5e665fadb9)
Compare | [a38b50c3a2f828458d15e68c78460db3ec7e5cda](https://github.com/dotnet/runtime/commit/a38b50c3a2f828458d15e68c78460db3ec7e5cda)
Diff | [Diff](https://github.com/dotnet/runtime/compare/c9f80fdde29c71ac87971383c77a1a5e665fadb9...a38b50c3a2f828458d15e68c78460db3ec7e5cda)


### Regressions in System.Buffers.Tests.RentReturnArrayPoolTests&lt;Object&gt;

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio | Baseline ETL | Compare ETL
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[MultipleSerial - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Buffers.Tests.RentReturnArrayPoolTests(Object).MultipleSerial(RentalSize%3a%204096%2c%20ManipulateArray%3a%20False%2c%20Async%3a%20False%2c%20UseSharedPool%3a%20False).html>) | 351.77 ns | 378.77 ns | 1.08 | 0.05 | False | | |
[SingleParallel - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Buffers.Tests.RentReturnArrayPoolTests(Object).SingleParallel(RentalSize%3a%204096%2c%20ManipulateArray%3a%20False%2c%20Async%3a%20False%2c%20UseSharedPool%3a%20False).html>) | 7.32 μs | 7.97 μs | 1.09 | 0.64 | False | | |

![graph](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/06_30_2022/refs/heads/main_arm64_ubuntu%2020.04_Regression/System.Buffers.Tests.RentReturnArrayPoolTests(Object)_1.png>)
![graph](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/06_30_2022/refs/heads/main_arm64_ubuntu%2020.04_Regression/System.Buffers.Tests.RentReturnArrayPoolTests(Object)_2.png>)
[Test Report](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/06_30_2022/refs/heads/main_arm64_ubuntu%2020.04_Regression/System.Buffers.Tests.RentReturnArrayPoolTests(Object).html>)

### Repro

```cmd
git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_ci.py -f net6.0 --filter 'System.Buffers.Tests.RentReturnArrayPoolTests&lt;Object&gt;*'
```
<details>

### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-f020198e-980a-451a-a1da-dd9c6010ae87fa7b87fe231464ba3/81c8b129-9622-4303-aaac-fd8deb0ed14c.zip?sv=2021-06-08&se=2022-07-26T19%3A15%3A16Z&sr=c&sp=rl&sig=SSkOBT%2FmC8JuHrmiwY0QB9Cand5m51M1ssA4PTh1cEw%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-b081332b-1191-4b42-9ad3-d07e405f5567e7626c517a7431b99/f1b87b87-ff84-4487-9de9-d55009f55484.zip?sv=2021-06-08&se=2022-07-27T23%3A17%3A09Z&sr=c&sp=rl&sig=BjgCDFEprLu5tLz2n6eDm7HkAj0MP6BflYJ9Uua9XiA%3D>)
### Histogram

#### System.Buffers.Tests.RentReturnArrayPoolTests&lt;Object&gt;.MultipleSerial(RentalSize: 4096, ManipulateArray: False, Async: False, UseSharedPool: False)

```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 378.76595033333336 > 369.10307163333334.
IsChangePoint: Marked as a change because one of 6/19/2022 10:30:09 AM, 6/27/2022 8:54:23 AM, 6/30/2022 12:21:07 PM falls between 6/21/2022 9:29:01 PM and 6/30/2022 12:21:07 PM.
IsRegressionStdDev: Marked as regression because -35.54303301900895 (T) = (0 -378.6799848611111) / Math.Sqrt((15.14520057775964 / (32)) + (0.9888827785107522 / (12))) is less than -2.0180817028167235 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (32) + (12) - 2, .025) and -0.07523194857242699 = (352.18446156094984 - 378.6799848611111) / 352.18446156094984 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.Buffers.Tests.RentReturnArrayPoolTests&lt;Object&gt;.SingleParallel(RentalSize: 4096, ManipulateArray: False, Async: False, UseSharedPool: False)

```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 7.971872746499999 > 6.724874629200001.
IsChangePoint: Marked as a change because one of 5/30/2022 4:33:23 PM, 6/27/2022 8:54:23 AM, 6/30/2022 12:21:07 PM falls between 6/21/2022 9:29:01 PM and 6/30/2022 12:21:07 PM.
IsRegressionStdDev: Marked as regression because -8.521013743535269 (T) = (0 -8200.837295708334) / Math.Sqrt((235835.19010466183 / (32)) + (449876.24444322934 / (12))) is less than -2.0180817028167235 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (32) + (12) - 2, .025) and -0.28216603074986774 = (6396.0806159496515 - 8200.837295708334) / 6396.0806159496515 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 | ubuntu 20.04
Baseline | [c9f80fdde29c71ac87971383c77a1a5e665fadb9](https://github.com/dotnet/runtime/commit/c9f80fdde29c71ac87971383c77a1a5e665fadb9)
Compare | [a38b50c3a2f828458d15e68c78460db3ec7e5cda](https://github.com/dotnet/runtime/commit/a38b50c3a2f828458d15e68c78460db3ec7e5cda)
Diff | [Diff](https://github.com/dotnet/runtime/compare/c9f80fdde29c71ac87971383c77a1a5e665fadb9...a38b50c3a2f828458d15e68c78460db3ec7e5cda)


### Regressions in System.Buffers.Text.Tests.Utf8FormatterTests

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio | Baseline ETL | Compare ETL
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[FormatterInt32 - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Buffers.Text.Tests.Utf8FormatterTests.FormatterInt32(value%3a%2012345).html>) | 9.82 ns | 15.97 ns | 1.63 | 0.16 | False | | |
[FormatterInt64 - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Buffers.Text.Tests.Utf8FormatterTests.FormatterInt64(value%3a%2012345).html>) | 10.42 ns | 16.10 ns | 1.55 | 0.20 | False | | |
[FormatterInt32 - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Buffers.Text.Tests.Utf8FormatterTests.FormatterInt32(value%3a%204).html>) | 3.01 ns | 6.25 ns | 2.08 | 0.45 | False | | |
[FormatterInt32 - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Buffers.Text.Tests.Utf8FormatterTests.FormatterInt32(value%3a%202147483647).html>) | 23.21 ns | 28.53 ns | 1.23 | 0.02 | False | | |
[FormatterInt64 - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Buffers.Text.Tests.Utf8FormatterTests.FormatterInt64(value%3a%20-9223372036854775808).html>) | 48.79 ns | 54.49 ns | 1.12 | 0.00 | False | | |
[FormatterInt32 - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Buffers.Text.Tests.Utf8FormatterTests.FormatterInt32(value%3a%20-2147483648).html>) | 21.64 ns | 27.80 ns | 1.28 | 0.02 | False | | |
[FormatterInt64 - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Buffers.Text.Tests.Utf8FormatterTests.FormatterInt64(value%3a%209223372036854775807).html>) | 51.93 ns | 55.85 ns | 1.08 | 0.00 | False | | |

![graph](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/06_30_2022/refs/heads/main_arm64_ubuntu%2020.04_Regression/System.Buffers.Text.Tests.Utf8FormatterTests_1.png>)
![graph](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/06_30_2022/refs/heads/main_arm64_ubuntu%2020.04_Regression/System.Buffers.Text.Tests.Utf8FormatterTests_2.png>)
![graph](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/06_30_2022/refs/heads/main_arm64_ubuntu%2020.04_Regression/System.Buffers.Text.Tests.Utf8FormatterTests_3.png>)
![graph](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/06_30_2022/refs/heads/main_arm64_ubuntu%2020.04_Regression/System.Buffers.Text.Tests.Utf8FormatterTests_4.png>)
![graph](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/06_30_2022/refs/heads/main_arm64_ubuntu%2020.04_Regression/System.Buffers.Text.Tests.Utf8FormatterTests_5.png>)
![graph](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/06_30_2022/refs/heads/main_arm64_ubuntu%2020.04_Regression/System.Buffers.Text.Tests.Utf8FormatterTests_6.png>)
![graph](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/06_30_2022/refs/heads/main_arm64_ubuntu%2020.04_Regression/System.Buffers.Text.Tests.Utf8FormatterTests_7.png>)
[Test Report](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/06_30_2022/refs/heads/main_arm64_ubuntu%2020.04_Regression/System.Buffers.Text.Tests.Utf8FormatterTests.html>)

### Repro

```cmd
git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_ci.py -f net6.0 --filter 'System.Buffers.Text.Tests.Utf8FormatterTests*'
```
<details>

### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-f020198e-980a-451a-a1da-dd9c6010ae87fa7b87fe231464ba3/81c8b129-9622-4303-aaac-fd8deb0ed14c.zip?sv=2021-06-08&se=2022-07-26T19%3A15%3A16Z&sr=c&sp=rl&sig=SSkOBT%2FmC8JuHrmiwY0QB9Cand5m51M1ssA4PTh1cEw%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-b081332b-1191-4b42-9ad3-d07e405f5567e7626c517a7431b99/f1b87b87-ff84-4487-9de9-d55009f55484.zip?sv=2021-06-08&se=2022-07-27T23%3A17%3A09Z&sr=c&sp=rl&sig=BjgCDFEprLu5tLz2n6eDm7HkAj0MP6BflYJ9Uua9XiA%3D>)
### Histogram

#### System.Buffers.Text.Tests.Utf8FormatterTests.FormatterInt32(value: 12345)

```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 15.972661986380423 > 10.892674528760839.
IsChangePoint: Marked as a change because one of 6/27/2022 8:54:23 AM, 6/30/2022 12:21:07 PM falls between 6/21/2022 9:29:01 PM and 6/30/2022 12:21:07 PM.
IsRegressionStdDev: Marked as regression because -54.720373930164925 (T) = (0 -15.819675463730695) / Math.Sqrt((0.23147261689839174 / (32)) + (0.041780717070086536 / (12))) is less than -2.0180817028167235 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (32) + (12) - 2, .025) and -0.5577714757301261 = (10.155324904967866 - 15.819675463730695) / 10.155324904967866 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.Buffers.Text.Tests.Utf8FormatterTests.FormatterInt64(value: 12345)

```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 16.09793687781935 > 10.824888950439226.
IsChangePoint: Marked as a change because one of 6/27/2022 8:54:23 AM, 6/30/2022 12:21:07 PM falls between 6/21/2022 9:29:01 PM and 6/30/2022 12:21:07 PM.
IsRegressionStdDev: Marked as regression because -85.17981573969624 (T) = (0 -16.084501663821538) / Math.Sqrt((0.09366564672038877 / (32)) + (0.019441132352970018 / (12))) is less than -2.0180817028167235 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (32) + (12) - 2, .025) and -0.5554691210964263 = (10.340611360053114 - 16.084501663821538) / 10.340611360053114 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.Buffers.Text.Tests.Utf8FormatterTests.FormatterInt32(value: 4)

```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 6.250267075893282 > 3.352759540047291.
IsChangePoint: Marked as a change because one of 6/27/2022 8:54:23 AM, 6/30/2022 12:21:07 PM falls between 6/21/2022 9:29:01 PM and 6/30/2022 12:21:07 PM.
IsRegressionStdDev: Marked as regression because -40.262601231643046 (T) = (0 -6.38887748599731) / Math.Sqrt((0.05214754665397373 / (32)) + (0.05028820581828033 / (12))) is less than -2.0180817028167235 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (32) + (12) - 2, .025) and -0.9259796783391032 = (3.3172091885760975 - 6.38887748599731) / 3.3172091885760975 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.Buffers.Text.Tests.Utf8FormatterTests.FormatterInt32(value: 2147483647)

```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 28.534069930021154 > 24.45641570850646.
IsChangePoint: Marked as a change because one of 6/27/2022 8:54:23 AM, 6/30/2022 12:21:07 PM falls between 6/21/2022 9:29:01 PM and 6/30/2022 12:21:07 PM.
IsRegressionStdDev: Marked as regression because -74.28006930773032 (T) = (0 -28.327018439232784) / Math.Sqrt((0.0551718473136399 / (32)) + (0.03327214186978605 / (12))) is less than -2.0180817028167235 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (32) + (12) - 2, .025) and -0.21335989886260198 = (23.345932617178466 - 28.327018439232784) / 23.345932617178466 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.Buffers.Text.Tests.Utf8FormatterTests.FormatterInt64(value: -9223372036854775808)

```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 54.49095898922284 > 51.227091925254726.
IsChangePoint: Marked as a change because one of 6/27/2022 8:54:23 AM, 6/30/2022 12:21:07 PM falls between 6/21/2022 9:29:01 PM and 6/30/2022 12:21:07 PM.
IsRegressionStdDev: Marked as regression because -42.96161504376527 (T) = (0 -54.068247923961614) / Math.Sqrt((0.13240447345404585 / (32)) + (0.14339452112148282 / (12))) is less than -2.0180817028167235 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (32) + (12) - 2, .025) and -0.11207604377403953 = (48.61920030258977 - 54.068247923961614) / 48.61920030258977 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.Buffers.Text.Tests.Utf8FormatterTests.FormatterInt32(value: -2147483648)

```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 27.795311175006713 > 22.797346430260795.
IsChangePoint: Marked as a change because one of 6/27/2022 8:54:23 AM, 6/30/2022 12:21:07 PM falls between 6/21/2022 9:29:01 PM and 6/30/2022 12:21:07 PM.
IsRegressionStdDev: Marked as regression because -110.16261371835587 (T) = (0 -27.615813537490684) / Math.Sqrt((0.02893923834467118 / (32)) + (0.024010447309944224 / (12))) is less than -2.0180817028167235 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (32) + (12) - 2, .025) and -0.27390750635811145 = (21.67803659187132 - 27.615813537490684) / 21.67803659187132 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.Buffers.Text.Tests.Utf8FormatterTests.FormatterInt64(value: 9223372036854775807)

```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 55.848231463165604 > 54.11531003142006.
IsChangePoint: Marked as a change because one of 6/27/2022 8:54:23 AM, 6/30/2022 12:21:07 PM falls between 6/21/2022 9:29:01 PM and 6/30/2022 12:21:07 PM.
IsRegressionStdDev: Marked as regression because -30.30745666185831 (T) = (0 -56.216933586070546) / Math.Sqrt((0.16993580402529118 / (32)) + (0.24770725649393255 / (12))) is less than -2.0180817028167235 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (32) + (12) - 2, .025) and -0.0951113723664043 = (51.33444415301112 - 56.216933586070546) / 51.33444415301112 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 | ubuntu 20.04
Baseline | [c9f80fdde29c71ac87971383c77a1a5e665fadb9](https://github.com/dotnet/runtime/commit/c9f80fdde29c71ac87971383c77a1a5e665fadb9)
Compare | [a38b50c3a2f828458d15e68c78460db3ec7e5cda](https://github.com/dotnet/runtime/commit/a38b50c3a2f828458d15e68c78460db3ec7e5cda)
Diff | [Diff](https://github.com/dotnet/runtime/compare/c9f80fdde29c71ac87971383c77a1a5e665fadb9...a38b50c3a2f828458d15e68c78460db3ec7e5cda)


### Regressions in System.Collections.Concurrent.Count&lt;String&gt;

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_arm64_ubuntu 20.04/System.Collections.Concurrent.Count(String).Queue(Size%3a%20512).html>) | 7.78 ns | 12.44 ns | 1.60 | 0.05 | False | | |
[Queue_EnqueueCountDequeue - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Collections.Concurrent.Count(String).Queue_EnqueueCountDequeue(Size%3a%20512).html>) | 33.47 ns | 42.69 ns | 1.28 | 0.11 | False | | |

![graph](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/06_30_2022/refs/heads/main_arm64_ubuntu%2020.04_Regression/System.Collections.Concurrent.Count(String)_1.png>)
![graph](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/06_30_2022/refs/heads/main_arm64_ubuntu%2020.04_Regression/System.Collections.Concurrent.Count(String)_2.png>)
[Test Report](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/06_30_2022/refs/heads/main_arm64_ubuntu%2020.04_Regression/System.Collections.Concurrent.Count(String).html>)

### Repro

```cmd
git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_ci.py -f net6.0 --filter 'System.Collections.Concurrent.Count&lt;String&gt;*'
```
<details>

### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-f020198e-980a-451a-a1da-dd9c6010ae87fa7b87fe231464ba3/81c8b129-9622-4303-aaac-fd8deb0ed14c.zip?sv=2021-06-08&se=2022-07-26T19%3A15%3A16Z&sr=c&sp=rl&sig=SSkOBT%2FmC8JuHrmiwY0QB9Cand5m51M1ssA4PTh1cEw%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-b081332b-1191-4b42-9ad3-d07e405f5567e7626c517a7431b99/f1b87b87-ff84-4487-9de9-d55009f55484.zip?sv=2021-06-08&se=2022-07-27T23%3A17%3A09Z&sr=c&sp=rl&sig=BjgCDFEprLu5tLz2n6eDm7HkAj0MP6BflYJ9Uua9XiA%3D>)
### Histogram

#### System.Collections.Concurrent.Count&lt;String&gt;.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 12.440158083173902 > 8.179443964478883.
IsChangePoint: Marked as a change because one of 6/27/2022 8:54:23 AM, 6/30/2022 12:21:07 PM falls between 6/21/2022 9:29:01 PM and 6/30/2022 12:21:07 PM.
IsRegressionStdDev: Marked as regression because -146.98536372924585 (T) = (0 -12.371144724936286) / Math.Sqrt((0.014615805850382501 / (32)) + (0.0061045493574273715 / (12))) is less than -2.0180817028167235 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (32) + (12) - 2, .025) and -0.5852219552120929 = (7.8040457894624 - 12.371144724936286) / 7.8040457894624 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.Concurrent.Count&lt;String&gt;.Queue_EnqueueCountDequeue(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 42.689222531441224 > 35.04501625853797.
IsChangePoint: Marked as a change because one of 6/27/2022 8:54:23 AM, 6/30/2022 12:21:07 PM falls between 6/21/2022 9:29:01 PM and 6/30/2022 12:21:07 PM.
IsRegressionStdDev: Marked as regression because -76.91165895557451 (T) = (0 -42.74227963262908) / Math.Sqrt((0.4322036508108061 / (32)) + (0.005601279562968299 / (12))) is less than -2.0180817028167235 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (32) + (12) - 2, .025) and -0.2701748915241361 = (33.650704259584934 - 42.74227963262908) / 33.650704259584934 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 | ubuntu 20.04
Baseline | [c9f80fdde29c71ac87971383c77a1a5e665fadb9](https://github.com/dotnet/runtime/commit/c9f80fdde29c71ac87971383c77a1a5e665fadb9)
Compare | [a38b50c3a2f828458d15e68c78460db3ec7e5cda](https://github.com/dotnet/runtime/commit/a38b50c3a2f828458d15e68c78460db3ec7e5cda)
Diff | [Diff](https://github.com/dotnet/runtime/compare/c9f80fdde29c71ac87971383c77a1a5e665fadb9...a38b50c3a2f828458d15e68c78460db3ec7e5cda)


### Regressions in System.Buffers.Tests.ReadOnlySequenceTests&lt;Char&gt;

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio | Baseline ETL | Compare ETL
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[FirstSpanTenSegments - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 20.04/System.Buffers.Tests.ReadOnlySequenceTests(Char).FirstSpanTenSegments.html>) | 6.66 ns | 8.73 ns | 1.31 | 0.01 | False | | |

![graph](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/06_30_2022/refs/heads/main_arm64_ubuntu%2020.04_Regression/System.Buffers.Tests.ReadOnlySequenceTests(Char)_1.png>)
[Test Report](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/06_30_2022/refs/heads/main_arm64_ubuntu%2020.04_Regression/System.Buffers.Tests.ReadOnlySequenceTests(Char).html>)

### Repro

```cmd
git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_ci.py -f net6.0 --filter 'System.Buffers.Tests.ReadOnlySequenceTests&lt;Char&gt;*'
```
<details>

### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-f020198e-980a-451a-a1da-dd9c6010ae87fa7b87fe231464ba3/81c8b129-9622-4303-aaac-fd8deb0ed14c.zip?sv=2021-06-08&se=2022-07-26T19%3A15%3A16Z&sr=c&sp=rl&sig=SSkOBT%2FmC8JuHrmiwY0QB9Cand5m51M1ssA4PTh1cEw%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-b081332b-1191-4b42-9ad3-d07e405f5567e7626c517a7431b99/f1b87b87-ff84-4487-9de9-d55009f55484.zip?sv=2021-06-08&se=2022-07-27T23%3A17%3A09Z&sr=c&sp=rl&sig=BjgCDFEprLu5tLz2n6eDm7HkAj0MP6BflYJ9Uua9XiA%3D>)
### Histogram

#### System.Buffers.Tests.ReadOnlySequenceTests&lt;Char&gt;.FirstSpanTenSegments

```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 8.733886982660364 > 6.9937097877618255.
IsChangePoint: Marked as a change because one of 5/20/2022 10:18:01 PM, 6/27/2022 8:54:23 AM, 6/30/2022 12:21:07 PM falls between 6/21/2022 9:29:01 PM and 6/30/2022 12:21:07 PM.
IsRegressionStdDev: Marked as regression because -179.81577296993908 (T) = (0 -8.75725016440443) / Math.Sqrt((0.0021192516157491448 / (32)) + (0.0008248153498479827 / (12))) is less than -2.0180817028167235 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (32) + (12) - 2, .025) and -0.3132697641219422 = (6.668279742402785 - 8.75725016440443) / 6.668279742402785 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	ubuntu 20.04
Baseline	c9f80fdde29c71ac87971383c77a1a5e665fadb9
Compare	a38b50c3a2f828458d15e68c78460db3ec7e5cda
Diff	Diff

Benchmark	Baseline	Test	Test/Base	Edge Detector
WriteDeepUtf16 - Duration of single invocation	4.93 ms	5.29 ms	1.07	False
WriteDeepUtf8 - Duration of single invocation	4.97 ms	5.26 ms	1.06	False
WriteDeepUtf16 - Duration of single invocation	5.25 ms	5.55 ms	1.06	False

Benchmark	Baseline	Test	Test/Base	Edge Detector
WriteBasicUtf16 - Duration of single invocation	2.13 ms	2.41 ms	1.13	False
WriteBasicUtf8 - Duration of single invocation	2.12 ms	2.39 ms	1.12	False
WriteBasicUtf8 - Duration of single invocation	2.84 ms	3.09 ms	1.09	False
WriteBasicUtf16 - Duration of single invocation	3.01 ms	3.28 ms	1.09	False
WriteBasicUtf16 - Duration of single invocation	2.28 ms	2.55 ms	1.12	False
WriteBasicUtf16 - Duration of single invocation	2.85 ms	3.12 ms	1.09	False
WriteBasicUtf8 - Duration of single invocation	3.03 ms	3.27 ms	1.08	False
WriteBasicUtf8 - Duration of single invocation	2.27 ms	2.56 ms	1.12	False

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio	Baseline ETL	Compare ETL
MultipleSerial - Duration of single invocation	351.77 ns	378.77 ns	1.08	0.05	False
SingleParallel - Duration of single invocation	7.32 μs	7.97 μs	1.09	0.64	False

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector
FormatterInt32 - Duration of single invocation	9.82 ns	15.97 ns	1.63	0.16	False
FormatterInt64 - Duration of single invocation	10.42 ns	16.10 ns	1.55	0.20	False
FormatterInt32 - Duration of single invocation	3.01 ns	6.25 ns	2.08	0.45	False
FormatterInt32 - Duration of single invocation	23.21 ns	28.53 ns	1.23	0.02	False
FormatterInt64 - Duration of single invocation	48.79 ns	54.49 ns	1.12	0.00	False
FormatterInt32 - Duration of single invocation	21.64 ns	27.80 ns	1.28	0.02	False
FormatterInt64 - Duration of single invocation	51.93 ns	55.85 ns	1.08	0.00	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	7.78 ns	12.44 ns	1.60	0.05	False
Queue_EnqueueCountDequeue - Duration of single invocation	33.47 ns	42.69 ns	1.28	0.11	False

Regressions in System.Buffers.Tests.RentReturnArrayPoolTests<Object> #72194

Description

Run Information

Regressions in System.Text.Json.Tests.Perf_Deep

Repro

Payloads

Histogram

System.Text.Json.Tests.Perf_Deep.WriteDeepUtf16(Formatted: False, SkipValidation: True)

Description of detection logic

Description of detection logic

Description of detection logic

Docs

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

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