[Perf] Changes at 6/27/2022 5:19:23 PM

### Run Information

Architecture | arm64
-- | --
OS | ubuntu 18.04
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
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[WriteBasicUtf8 - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 18.04/System.Text.Json.Tests.Perf_Basic.WriteBasicUtf8(Formatted%3a%20True%2c%20SkipValidation%3a%20False%2c%20DataSize%3a%20100000).html>) | 4.10 ms | 4.44 ms | 1.08 | 0.29 | False | | |
[WriteBasicUtf16 - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 18.04/System.Text.Json.Tests.Perf_Basic.WriteBasicUtf16(Formatted%3a%20False%2c%20SkipValidation%3a%20False%2c%20DataSize%3a%20100000).html>) | 3.00 ms | 3.30 ms | 1.10 | 0.14 | False | | |
[WriteBasicUtf16 - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 18.04/System.Text.Json.Tests.Perf_Basic.WriteBasicUtf16(Formatted%3a%20True%2c%20SkipValidation%3a%20False%2c%20DataSize%3a%20100000).html>) | 4.03 ms | 4.90 ms | 1.22 | 0.13 | False | | |
[WriteBasicUtf16 - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 18.04/System.Text.Json.Tests.Perf_Basic.WriteBasicUtf16(Formatted%3a%20True%2c%20SkipValidation%3a%20True%2c%20DataSize%3a%20100000).html>) | 3.57 ms | 4.26 ms | 1.19 | 0.22 | False | | |
[WriteBasicUtf16 - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 18.04/System.Text.Json.Tests.Perf_Basic.WriteBasicUtf16(Formatted%3a%20False%2c%20SkipValidation%3a%20True%2c%20DataSize%3a%20100000).html>) | 2.69 ms | 2.98 ms | 1.11 | 0.16 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/06_30_2022/refs/heads/main_arm64_ubuntu%2018.04_Regression/System.Text.Json.Tests.Perf_Basic_1.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/06_30_2022/refs/heads/main_arm64_ubuntu%2018.04_Regression/System.Text.Json.Tests.Perf_Basic_2.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/06_30_2022/refs/heads/main_arm64_ubuntu%2018.04_Regression/System.Text.Json.Tests.Perf_Basic_3.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/06_30_2022/refs/heads/main_arm64_ubuntu%2018.04_Regression/System.Text.Json.Tests.Perf_Basic_4.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/06_30_2022/refs/heads/main_arm64_ubuntu%2018.04_Regression/System.Text.Json.Tests.Perf_Basic_5.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/06_30_2022/refs/heads/main_arm64_ubuntu%2018.04_Regression/System.Text.Json.Tests.Perf_Basic.html>)

### Repro

```cmd
git clone https://github.com/dotnet/performance.git
python3 .\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-db018dcc-0250-48b3-829a-a9c0ceb18bd45ad07ba4d624bffbd/f4fb8a24-a2ae-4385-bbf0-30b17a7906c1.zip?sv=2021-06-08&se=2022-07-26T19%3A16%3A41Z&sr=c&sp=rl&sig=LlZWYCDJBxvTG5D0xR%2FEid746E6BcmfDiZjQW2FmI94%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-46474b01-40fd-455d-b0f9-5b2567a8ce9cdec88bf13f54a9083/ef373c07-10c4-490e-81f9-e172b06a8d44.zip?sv=2021-06-08&se=2022-07-27T23%3A21%3A23Z&sr=c&sp=rl&sig=U%2Bes%2Fu9jgob8HghVld%2B50ZBjMhZ3M%2BH4VJQeAcBof64%3D>)
### Histogram

#### 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 4.444458431168831 > 4.311377064942185.
IsChangePoint: Marked as a change because one of 3/17/2022 6:54:53 PM, 4/14/2022 4:58:13 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 -16.83379344648698 (T) = (0 -4463305.100109552) / Math.Sqrt((9142080237.480173 / (32)) + (827201494.6939982 / (12))) is less than -2.0180817028167235 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (32) + (12) - 2, .025) and -0.07645483707550935 = (4146300.3800840997 - 4463305.100109552) / 4146300.3800840997 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 3.3006775093984952 > 3.1589532336930657.
IsChangePoint: Marked as a change because one of 3/17/2022 6:54:53 PM, 4/16/2022 8:46:33 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 -19.042326597587493 (T) = (0 -3263586.6601551957) / Math.Sqrt((3596978411.389027 / (32)) + (871565799.7410324 / (12))) is less than -2.0180817028167235 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (32) + (12) - 2, .025) and -0.08621198296409414 = (3004557.776327788 - 3263586.6601551957) / 3004557.776327788 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 4.897048922222223 > 4.247385092811829.
IsChangePoint: Marked as a change because one of 3/17/2022 11:30:59 AM, 4/14/2022 9:05:43 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 -9.517592618394199 (T) = (0 -4504264.109989512) / Math.Sqrt((7036560955.811689 / (32)) + (21098221125.94473 / (12))) is less than -2.0180817028167235 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (32) + (12) - 2, .025) and -0.10372562352431872 = (4080963.61449587 - 4504264.109989512) / 4080963.61449587 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 4.258219942690059 > 3.7959758508970585.
IsChangePoint: Marked as a change because one of 3/14/2022 7:02:48 PM, 4/14/2022 9:05:43 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 -13.527137559910468 (T) = (0 -4344886.498613778) / Math.Sqrt((22752946990.1049 / (32)) + (20337299786.97004 / (12))) is less than -2.0180817028167235 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (32) + (12) - 2, .025) and -0.1802286339097474 = (3681393.9043492423 - 4344886.498613778) / 3681393.9043492423 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: 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 2.981186115662651 > 2.838501074550744.
IsChangePoint: Marked as a change because one of 3/17/2022 11:30:59 AM, 4/16/2022 2:55:52 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 -13.43886572168155 (T) = (0 -3037361.6314837974) / Math.Sqrt((5921492961.505787 / (32)) + (4220622328.004373 / (12))) is less than -2.0180817028167235 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (32) + (12) - 2, .025) and -0.11421621236995425 = (2726007.3922486594 - 3037361.6314837974) / 2726007.3922486594 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 18.04
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
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[FormatterInt64 - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 18.04/System.Buffers.Text.Tests.Utf8FormatterTests.FormatterInt64(value%3a%209223372036854775807).html>) | 47.75 ns | 58.05 ns | 1.22 | 0.40 | False | | |
[FormatterInt32 - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 18.04/System.Buffers.Text.Tests.Utf8FormatterTests.FormatterInt32(value%3a%2012345).html>) | 13.48 ns | 23.88 ns | 1.77 | 0.76 | False | | |
[FormatterInt32 - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 18.04/System.Buffers.Text.Tests.Utf8FormatterTests.FormatterInt32(value%3a%202147483647).html>) | 20.80 ns | 27.50 ns | 1.32 | 0.72 | False | | |
[FormatterInt32 - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 18.04/System.Buffers.Text.Tests.Utf8FormatterTests.FormatterInt32(value%3a%20-2147483648).html>) | 18.13 ns | 23.85 ns | 1.32 | 0.69 | False | | |
[FormatterInt64 - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 18.04/System.Buffers.Text.Tests.Utf8FormatterTests.FormatterInt64(value%3a%20-9223372036854775808).html>) | 44.67 ns | 50.71 ns | 1.14 | 0.48 | False | | |
[FormatterInt64 - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 18.04/System.Buffers.Text.Tests.Utf8FormatterTests.FormatterInt64(value%3a%2012345).html>) | 16.18 ns | 22.72 ns | 1.40 | 0.76 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/06_30_2022/refs/heads/main_arm64_ubuntu%2018.04_Regression/System.Buffers.Text.Tests.Utf8FormatterTests_1.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/06_30_2022/refs/heads/main_arm64_ubuntu%2018.04_Regression/System.Buffers.Text.Tests.Utf8FormatterTests_2.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/06_30_2022/refs/heads/main_arm64_ubuntu%2018.04_Regression/System.Buffers.Text.Tests.Utf8FormatterTests_3.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/06_30_2022/refs/heads/main_arm64_ubuntu%2018.04_Regression/System.Buffers.Text.Tests.Utf8FormatterTests_4.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/06_30_2022/refs/heads/main_arm64_ubuntu%2018.04_Regression/System.Buffers.Text.Tests.Utf8FormatterTests_5.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/06_30_2022/refs/heads/main_arm64_ubuntu%2018.04_Regression/System.Buffers.Text.Tests.Utf8FormatterTests_6.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/06_30_2022/refs/heads/main_arm64_ubuntu%2018.04_Regression/System.Buffers.Text.Tests.Utf8FormatterTests.html>)

### Repro

```cmd
git clone https://github.com/dotnet/performance.git
python3 .\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-db018dcc-0250-48b3-829a-a9c0ceb18bd45ad07ba4d624bffbd/f4fb8a24-a2ae-4385-bbf0-30b17a7906c1.zip?sv=2021-06-08&se=2022-07-26T19%3A16%3A41Z&sr=c&sp=rl&sig=LlZWYCDJBxvTG5D0xR%2FEid746E6BcmfDiZjQW2FmI94%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-46474b01-40fd-455d-b0f9-5b2567a8ce9cdec88bf13f54a9083/ef373c07-10c4-490e-81f9-e172b06a8d44.zip?sv=2021-06-08&se=2022-07-27T23%3A21%3A23Z&sr=c&sp=rl&sig=U%2Bes%2Fu9jgob8HghVld%2B50ZBjMhZ3M%2BH4VJQeAcBof64%3D>)
### Histogram

#### 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 58.049817872416355 > 49.32882021594207.
IsChangePoint: Marked as a change because one of 4/15/2022 3:54:24 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 -7.452668879009599 (T) = (0 -53.986856534069894) / Math.Sqrt((6.588462114017324 / (32)) + (6.497378260181185 / (12))) is less than -2.0180817028167235 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (32) + (12) - 2, .025) and -0.13551064776552363 = (47.544121792522255 - 53.986856534069894) / 47.544121792522255 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: 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 23.87913629143294 > 13.948645017615885.
IsChangePoint: Marked as a change because one of 4/14/2022 9:05:43 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 -12.419496327778193 (T) = (0 -22.256574943366417) / Math.Sqrt((3.5330661656749265 / (32)) + (4.42466545747915 / (12))) is less than -2.0180817028167235 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (32) + (12) - 2, .025) and -0.6293374420188959 = (13.659892892284189 - 22.256574943366417) / 13.659892892284189 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 27.501393730681837 > 23.304146599893283.
IsChangePoint: Marked as a change because one of 4/14/2022 9:05:43 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 -9.081961084525158 (T) = (0 -30.03402578391474) / Math.Sqrt((6.864684459288596 / (32)) + (6.933184085420094 / (12))) is less than -2.0180817028167235 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (32) + (12) - 2, .025) and -0.3682847837321641 = (21.95012773729257 - 30.03402578391474) / 21.95012773729257 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 23.853929626161055 > 15.981084372597541.
IsChangePoint: Marked as a change because one of 4/14/2022 4:58:13 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 -13.3297358933596 (T) = (0 -24.888331841447478) / Math.Sqrt((3.6207930546753615 / (32)) + (3.923815476524818 / (12))) is less than -2.0180817028167235 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (32) + (12) - 2, .025) and -0.5511547266636977 = (16.045034975317108 - 24.888331841447478) / 16.045034975317108 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 50.7111355236821 > 46.29760386082962.
IsChangePoint: Marked as a change because one of 4/14/2022 9:05:43 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 -10.741645099401214 (T) = (0 -51.879611449806625) / Math.Sqrt((6.5820841116265 / (32)) + (4.838650830898245 / (12))) is less than -2.0180817028167235 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (32) + (12) - 2, .025) and -0.19270026991908473 = (43.49761021964575 - 51.879611449806625) / 43.49761021964575 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 22.722251919388587 > 14.126255740541126.
IsChangePoint: Marked as a change because one of 4/14/2022 9:05:43 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 -9.663538969944737 (T) = (0 -21.542573484412348) / Math.Sqrt((4.406705104294888 / (32)) + (4.366090843656918 / (12))) is less than -2.0180817028167235 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (32) + (12) - 2, .025) and -0.46559750339779227 = (14.698833366233748 - 21.542573484412348) / 14.698833366233748 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 18.04
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.Memory.Slice&lt;Byte&gt;

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio | Baseline ETL | Compare ETL
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[MemoryStartLengthSpan - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 18.04/System.Memory.Slice(Byte).MemoryStartLengthSpan.html>) | 9.24 ns | 10.58 ns | 1.14 | 0.42 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/06_30_2022/refs/heads/main_arm64_ubuntu%2018.04_Regression/System.Memory.Slice(Byte)_1.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/06_30_2022/refs/heads/main_arm64_ubuntu%2018.04_Regression/System.Memory.Slice(Byte).html>)

### Repro

```cmd
git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net6.0 --filter 'System.Memory.Slice&lt;Byte&gt;*'
```
<details>

### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-db018dcc-0250-48b3-829a-a9c0ceb18bd45ad07ba4d624bffbd/f4fb8a24-a2ae-4385-bbf0-30b17a7906c1.zip?sv=2021-06-08&se=2022-07-26T19%3A16%3A41Z&sr=c&sp=rl&sig=LlZWYCDJBxvTG5D0xR%2FEid746E6BcmfDiZjQW2FmI94%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-46474b01-40fd-455d-b0f9-5b2567a8ce9cdec88bf13f54a9083/ef373c07-10c4-490e-81f9-e172b06a8d44.zip?sv=2021-06-08&se=2022-07-27T23%3A21%3A23Z&sr=c&sp=rl&sig=U%2Bes%2Fu9jgob8HghVld%2B50ZBjMhZ3M%2BH4VJQeAcBof64%3D>)
### Histogram

#### System.Memory.Slice&lt;Byte&gt;.MemoryStartLengthSpan

```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 10.576191238946981 > 6.634014670785989.
IsChangePoint: Marked as a change because one of 3/17/2022 11:30:59 AM, 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 -8.971207503998814 (T) = (0 -11.684089223684104) / Math.Sqrt((1.5327994833127516 / (32)) + (2.7893696885360533 / (12))) is less than -2.0180817028167235 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (32) + (12) - 2, .025) and -0.6850363645735776 = (6.934027935142473 - 11.684089223684104) / 6.934027935142473 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 18.04
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.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_arm64_ubuntu 18.04/System.Collections.Concurrent.Count(String).Queue(Size%3a%20512).html>) | 39.66 ns | 56.60 ns | 1.43 | 0.64 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/06_30_2022/refs/heads/main_arm64_ubuntu%2018.04_Regression/System.Collections.Concurrent.Count(String)_1.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/06_30_2022/refs/heads/main_arm64_ubuntu%2018.04_Regression/System.Collections.Concurrent.Count(String).html>)

### Repro

```cmd
git clone https://github.com/dotnet/performance.git
python3 .\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-db018dcc-0250-48b3-829a-a9c0ceb18bd45ad07ba4d624bffbd/f4fb8a24-a2ae-4385-bbf0-30b17a7906c1.zip?sv=2021-06-08&se=2022-07-26T19%3A16%3A41Z&sr=c&sp=rl&sig=LlZWYCDJBxvTG5D0xR%2FEid746E6BcmfDiZjQW2FmI94%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-46474b01-40fd-455d-b0f9-5b2567a8ce9cdec88bf13f54a9083/ef373c07-10c4-490e-81f9-e172b06a8d44.zip?sv=2021-06-08&se=2022-07-27T23%3A21%3A23Z&sr=c&sp=rl&sig=U%2Bes%2Fu9jgob8HghVld%2B50ZBjMhZ3M%2BH4VJQeAcBof64%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 56.60361586920631 > 53.58270992560154.
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 -11.72357655439461 (T) = (0 -56.59333294525117) / Math.Sqrt((28.77074481077868 / (32)) + (3.2671018915573513 / (12))) is less than -2.0180817028167235 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (32) + (12) - 2, .025) and -0.28899331364477726 = (43.90506323514355 - 56.59333294525117) / 43.90506323514355 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 18.04
Baseline	c9f80fdde29c71ac87971383c77a1a5e665fadb9
Compare	a38b50c3a2f828458d15e68c78460db3ec7e5cda
Diff	Diff

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector
WriteBasicUtf8 - Duration of single invocation	4.10 ms	4.44 ms	1.08	0.29	False
WriteBasicUtf16 - Duration of single invocation	3.00 ms	3.30 ms	1.10	0.14	False
WriteBasicUtf16 - Duration of single invocation	4.03 ms	4.90 ms	1.22	0.13	False
WriteBasicUtf16 - Duration of single invocation	3.57 ms	4.26 ms	1.19	0.22	False
WriteBasicUtf16 - Duration of single invocation	2.69 ms	2.98 ms	1.11	0.16	False

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector
FormatterInt64 - Duration of single invocation	47.75 ns	58.05 ns	1.22	0.40	False
FormatterInt32 - Duration of single invocation	13.48 ns	23.88 ns	1.77	0.76	False
FormatterInt32 - Duration of single invocation	20.80 ns	27.50 ns	1.32	0.72	False
FormatterInt32 - Duration of single invocation	18.13 ns	23.85 ns	1.32	0.69	False
FormatterInt64 - Duration of single invocation	44.67 ns	50.71 ns	1.14	0.48	False
FormatterInt64 - Duration of single invocation	16.18 ns	22.72 ns	1.40	0.76	False

[Perf] Changes at 6/27/2022 5:19:23 PM #6480

Description

Run Information

Regressions in System.Text.Json.Tests.Perf_Basic

Repro

Payloads

Histogram

System.Text.Json.Tests.Perf_Basic.WriteBasicUtf8(Formatted: True, SkipValidation: False, DataSize: 100000)

Description of detection logic

Description of detection logic

Description of detection logic

Description of detection logic

Description of detection logic

Docs

Regressions in System.Buffers.Text.Tests.Utf8FormatterTests

Repro

Payloads

Histogram

System.Buffers.Text.Tests.Utf8FormatterTests.FormatterInt64(value: 9223372036854775807)

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

Regressions in System.Memory.Slice<Byte>

Repro

Payloads

Histogram

System.Memory.Slice<Byte>.MemoryStartLengthSpan

Description of detection logic

Docs

Run Information

Regressions in System.Collections.Concurrent.Count<String>

Repro

Payloads

Histogram

System.Collections.Concurrent.Count<String>.Queue(Size: 512)

Description of detection logic

Docs

Metadata

Metadata

Assignees

Labels

Type

Projects

Milestone

Relationships

Development

Issue actions