[Perf] Linux/x64: 29 Regressions on 3/1/2023 5:53:50 PM


### Run Information

Architecture | x64
-- | --
OS | ubuntu 18.04
Baseline | [605d05ba54ccea0ff5486926a7dc630cee5db8cd](https://github.com/dotnet/runtime/commit/605d05ba54ccea0ff5486926a7dc630cee5db8cd)
Compare | [ef0241ed9316bc4343e715daca4d88c1ff90231b](https://github.com/dotnet/runtime/commit/ef0241ed9316bc4343e715daca4d88c1ff90231b)
Diff | [Diff](https://github.com/dotnet/runtime/compare/605d05ba54ccea0ff5486926a7dc630cee5db8cd...ef0241ed9316bc4343e715daca4d88c1ff90231b)


### Regressions in System.Tests.Perf_String

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio | Baseline ETL | Compare ETL
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[IndexerCheckLengthHoisting - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 18.04_AOT=true_CompliationMode=wasm_RunKind=micro/System.Tests.Perf_String.IndexerCheckLengthHoisting.html>) | 26.39 ns | 41.83 ns | 1.59 | 0.52 | False | | |
[ToLower - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 18.04_AOT=true_CompliationMode=wasm_RunKind=micro/System.Tests.Perf_String.ToLower(s%3a%20%22This%20is%20a%20much%20longer%20piece%20of%20text%20that%20might%20benefit%20more%20from%20vectorization.%22).html>) | 225.62 ns | 353.43 ns | 1.57 | 0.15 | False | | |
[CtorCharCount - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 18.04_AOT=true_CompliationMode=wasm_RunKind=micro/System.Tests.Perf_String.CtorCharCount(size%3a%2010).html>) | 59.70 ns | 77.58 ns | 1.30 | 0.32 | False | | |
[PadLeft - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 18.04_AOT=true_CompliationMode=wasm_RunKind=micro/System.Tests.Perf_String.PadLeft(n%3a%2018).html>) | 79.43 ns | 103.09 ns | 1.30 | 0.40 | False | | |
[ToUpper - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 18.04_AOT=true_CompliationMode=wasm_RunKind=micro/System.Tests.Perf_String.ToUpper(s%3a%20%22This%20is%20a%20much%20longer%20piece%20of%20text%20that%20might%20benefit%20more%20from%20vectorization.%22).html>) | 224.64 ns | 377.85 ns | 1.68 | 0.16 | False | | |
[ToUpperInvariant - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 18.04_AOT=true_CompliationMode=wasm_RunKind=micro/System.Tests.Perf_String.ToUpperInvariant(s%3a%20%22This%20is%20a%20much%20longer%20piece%20of%20text%20that%20might%20benefit%20more%20from%20vectorization.%22).html>) | 193.00 ns | 306.12 ns | 1.59 | 0.11 | False | | |
[ToLowerInvariant - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 18.04_AOT=true_CompliationMode=wasm_RunKind=micro/System.Tests.Perf_String.ToLowerInvariant(s%3a%20%22This%20is%20a%20much%20longer%20piece%20of%20text%20that%20might%20benefit%20more%20from%20vectorization.%22).html>) | 205.16 ns | 303.99 ns | 1.48 | 0.10 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_08_2023/refs/heads/main_x64_ubuntu%2018.04_AOT=true_CompliationMode=wasm_RunKind=micro_Regression/System.Tests.Perf_String_1.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_08_2023/refs/heads/main_x64_ubuntu%2018.04_AOT=true_CompliationMode=wasm_RunKind=micro_Regression/System.Tests.Perf_String_2.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_08_2023/refs/heads/main_x64_ubuntu%2018.04_AOT=true_CompliationMode=wasm_RunKind=micro_Regression/System.Tests.Perf_String_3.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_08_2023/refs/heads/main_x64_ubuntu%2018.04_AOT=true_CompliationMode=wasm_RunKind=micro_Regression/System.Tests.Perf_String_4.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_08_2023/refs/heads/main_x64_ubuntu%2018.04_AOT=true_CompliationMode=wasm_RunKind=micro_Regression/System.Tests.Perf_String_5.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_08_2023/refs/heads/main_x64_ubuntu%2018.04_AOT=true_CompliationMode=wasm_RunKind=micro_Regression/System.Tests.Perf_String_6.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_08_2023/refs/heads/main_x64_ubuntu%2018.04_AOT=true_CompliationMode=wasm_RunKind=micro_Regression/System.Tests.Perf_String_7.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_08_2023/refs/heads/main_x64_ubuntu%2018.04_AOT=true_CompliationMode=wasm_RunKind=micro_Regression/System.Tests.Perf_String.html>)

### Repro
General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-e47c45a2-4ea6-41e2-90d8-db06d5d521c4264ac01aa6a4f28b8/26276bfe-86c3-4790-ab06-0610f2263acc.zip?sv=2021-08-06&se=2023-03-31T12%3A58%3A09Z&sr=c&sp=rl&sig=Tl%2F%2B5gr0Vsz6t2lxGBXdPB1h9hgs4NqE3wlSwvr097k%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-871f9744-2f00-448f-8af7-dfe6eeb359d28d3305937ba4f4298/f8f5857a-c103-4b77-8412-428575aabc43.zip?sv=2021-08-06&se=2023-03-31T23%3A03%3A11Z&sr=c&sp=rl&sig=aV7r8dwm4izeG9US4QZh7M9YjJHixCuJR37PC%2BiF6kc%3D>)

```cmd
git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Tests.Perf_String*'
```

<details>

### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-e47c45a2-4ea6-41e2-90d8-db06d5d521c4264ac01aa6a4f28b8/26276bfe-86c3-4790-ab06-0610f2263acc.zip?sv=2021-08-06&se=2023-03-31T12%3A58%3A09Z&sr=c&sp=rl&sig=Tl%2F%2B5gr0Vsz6t2lxGBXdPB1h9hgs4NqE3wlSwvr097k%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-871f9744-2f00-448f-8af7-dfe6eeb359d28d3305937ba4f4298/f8f5857a-c103-4b77-8412-428575aabc43.zip?sv=2021-08-06&se=2023-03-31T23%3A03%3A11Z&sr=c&sp=rl&sig=aV7r8dwm4izeG9US4QZh7M9YjJHixCuJR37PC%2BiF6kc%3D>)
### Histogram

#### System.Tests.Perf_String.IndexerCheckLengthHoisting

```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 41.82894696760661 > 27.703327538697756.
IsChangePoint: Marked as a change because one of 3/1/2023 3:09:21 PM, 3/7/2023 7:56:26 PM falls between 2/26/2023 10:10:21 PM and 3/7/2023 7:56:26 PM.
IsRegressionStdDev: Marked as regression because -32.191395005720636 (T) = (0 -39.227952731190776) / Math.Sqrt((2.2987827611203038 / (29)) + (2.130444531773961 / (39))) is less than -1.9965644189515832 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (29) + (39) - 2, .025) and -0.42914333445426117 = (27.448578309446148 - 39.227952731190776) / 27.448578309446148 is less than -0.05.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```#### System.Tests.Perf_String.ToLower(s: "This is a much longer piece of text that might benefit more from vectorization.")

```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 353.4337818960568 > 232.82118714013097.
IsChangePoint: Marked as a change because one of 1/12/2023 3:42:01 AM, 3/1/2023 3:09:21 PM, 3/7/2023 7:56:26 PM falls between 2/26/2023 10:10:21 PM and 3/7/2023 7:56:26 PM.
IsRegressionStdDev: Marked as regression because -40.634085757075816 (T) = (0 -362.1090027188929) / Math.Sqrt((20.297529142740533 / (30)) + (420.02307397867094 / (39))) is less than -1.9960083540247138 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (30) + (39) - 2, .025) and -0.6119985744079897 = (224.6335750339471 - 362.1090027188929) / 224.6335750339471 is less than -0.05.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```#### System.Tests.Perf_String.CtorCharCount(size: 10)

```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 77.57732561551073 > 66.44490945482254.
IsChangePoint: Marked as a change because one of 1/18/2023 3:58:17 AM, 3/1/2023 3:09:21 PM, 3/7/2023 7:56:26 PM falls between 2/26/2023 10:10:21 PM and 3/7/2023 7:56:26 PM.
IsRegressionStdDev: Marked as regression because -15.416099279258859 (T) = (0 -76.09339517367445) / Math.Sqrt((5.6031448767946035 / (30)) + (16.326698069258953 / (39))) is less than -1.9960083540247138 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (30) + (39) - 2, .025) and -0.18713272215230525 = (64.09847336674788 - 76.09339517367445) / 64.09847336674788 is less than -0.05.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```#### System.Tests.Perf_String.PadLeft(n: 18)

```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 103.08926884112797 > 85.43390280392919.
IsChangePoint: Marked as a change because one of 1/14/2023 10:43:56 AM, 3/1/2023 5:53:50 PM, 3/7/2023 7:56:26 PM falls between 2/26/2023 10:10:21 PM and 3/7/2023 7:56:26 PM.
IsRegressionStdDev: Marked as regression because -9.68525725823996 (T) = (0 -98.39761883754494) / Math.Sqrt((16.14965701158545 / (31)) + (69.64983621634943 / (38))) is less than -1.9960083540247138 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (31) + (38) - 2, .025) and -0.17787499411268176 = (83.538252640867 - 98.39761883754494) / 83.538252640867 is less than -0.05.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```#### System.Tests.Perf_String.ToUpper(s: "This is a much longer piece of text that might benefit more from vectorization.")

```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 377.84674911210425 > 237.63925886733796.
IsChangePoint: Marked as a change because one of 1/12/2023 3:42:01 AM, 3/1/2023 3:09:21 PM, 3/7/2023 7:56:26 PM falls between 2/26/2023 10:10:21 PM and 3/7/2023 7:56:26 PM.
IsRegressionStdDev: Marked as regression because -39.156693044760175 (T) = (0 -364.3480862142918) / Math.Sqrt((17.79434553648585 / (30)) + (475.4163860480634 / (39))) is less than -1.9960083540247138 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (30) + (39) - 2, .025) and -0.6240293682749661 = (224.34821274279054 - 364.3480862142918) / 224.34821274279054 is less than -0.05.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```#### System.Tests.Perf_String.ToUpperInvariant(s: "This is a much longer piece of text that might benefit more from vectorization.")

```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 306.12151880255936 > 203.10880620425826.
IsChangePoint: Marked as a change because one of 1/12/2023 3:42:01 AM, 3/1/2023 3:09:21 PM, 3/7/2023 7:56:26 PM falls between 2/26/2023 10:10:21 PM and 3/7/2023 7:56:26 PM.
IsRegressionStdDev: Marked as regression because -50.77168771921563 (T) = (0 -303.4604725821685) / Math.Sqrt((17.974454628641865 / (30)) + (160.15292965899772 / (39))) is less than -1.9960083540247138 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (30) + (39) - 2, .025) and -0.5696978903175034 = (193.3241259060286 - 303.4604725821685) / 193.3241259060286 is less than -0.05.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```#### System.Tests.Perf_String.ToLowerInvariant(s: "This is a much longer piece of text that might benefit more from vectorization.")

```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 303.9909950767776 > 200.74636420269337.
IsChangePoint: Marked as a change because one of 1/12/2023 3:42:01 AM, 3/1/2023 3:09:21 PM, 3/7/2023 7:56:26 PM falls between 2/26/2023 10:10:21 PM and 3/7/2023 7:56:26 PM.
IsRegressionStdDev: Marked as regression because -53.66505143777063 (T) = (0 -305.4980945172726) / Math.Sqrt((20.166320219948606 / (30)) + (140.9072518715231 / (39))) is less than -1.9960083540247138 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (30) + (39) - 2, .025) and -0.5714330257579686 = (194.40732726736346 - 305.4980945172726) / 194.40732726736346 is less than -0.05.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```

### Docs

[Profiling workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/profiling-workflow-dotnet-runtime.md)
[Benchmarking workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/benchmarking-workflow-dotnet-runtime.md)

</details>

### Run Information

Architecture | x64
-- | --
OS | ubuntu 18.04
Baseline | [605d05ba54ccea0ff5486926a7dc630cee5db8cd](https://github.com/dotnet/runtime/commit/605d05ba54ccea0ff5486926a7dc630cee5db8cd)
Compare | [ef0241ed9316bc4343e715daca4d88c1ff90231b](https://github.com/dotnet/runtime/commit/ef0241ed9316bc4343e715daca4d88c1ff90231b)
Diff | [Diff](https://github.com/dotnet/runtime/compare/605d05ba54ccea0ff5486926a7dc630cee5db8cd...ef0241ed9316bc4343e715daca4d88c1ff90231b)


### Regressions in System.Text.Tests.Perf_Encoding

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio | Baseline ETL | Compare ETL
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[GetByteCount - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 18.04_AOT=true_CompliationMode=wasm_RunKind=micro/System.Text.Tests.Perf_Encoding.GetByteCount(size%3a%2016%2c%20encName%3a%20%22utf-8%22).html>) | 38.61 ns | 44.33 ns | 1.15 | 0.63 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_08_2023/refs/heads/main_x64_ubuntu%2018.04_AOT=true_CompliationMode=wasm_RunKind=micro_Regression/System.Text.Tests.Perf_Encoding_1.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_08_2023/refs/heads/main_x64_ubuntu%2018.04_AOT=true_CompliationMode=wasm_RunKind=micro_Regression/System.Text.Tests.Perf_Encoding.html>)

### Repro
General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-e47c45a2-4ea6-41e2-90d8-db06d5d521c4264ac01aa6a4f28b8/26276bfe-86c3-4790-ab06-0610f2263acc.zip?sv=2021-08-06&se=2023-03-31T12%3A58%3A09Z&sr=c&sp=rl&sig=Tl%2F%2B5gr0Vsz6t2lxGBXdPB1h9hgs4NqE3wlSwvr097k%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-871f9744-2f00-448f-8af7-dfe6eeb359d28d3305937ba4f4298/f8f5857a-c103-4b77-8412-428575aabc43.zip?sv=2021-08-06&se=2023-03-31T23%3A03%3A11Z&sr=c&sp=rl&sig=aV7r8dwm4izeG9US4QZh7M9YjJHixCuJR37PC%2BiF6kc%3D>)

```cmd
git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Text.Tests.Perf_Encoding*'
```

<details>

### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-e47c45a2-4ea6-41e2-90d8-db06d5d521c4264ac01aa6a4f28b8/26276bfe-86c3-4790-ab06-0610f2263acc.zip?sv=2021-08-06&se=2023-03-31T12%3A58%3A09Z&sr=c&sp=rl&sig=Tl%2F%2B5gr0Vsz6t2lxGBXdPB1h9hgs4NqE3wlSwvr097k%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-871f9744-2f00-448f-8af7-dfe6eeb359d28d3305937ba4f4298/f8f5857a-c103-4b77-8412-428575aabc43.zip?sv=2021-08-06&se=2023-03-31T23%3A03%3A11Z&sr=c&sp=rl&sig=aV7r8dwm4izeG9US4QZh7M9YjJHixCuJR37PC%2BiF6kc%3D>)
### Histogram

#### System.Text.Tests.Perf_Encoding.GetByteCount(size: 16, encName: "utf-8")

```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 44.33202723180661 > 36.7779864338579.
IsChangePoint: Marked as a change because one of 1/17/2023 8:36:05 PM, 3/1/2023 3:09:21 PM, 3/7/2023 7:56:26 PM falls between 2/26/2023 10:10:21 PM and 3/7/2023 7:56:26 PM.
IsRegressionStdDev: Marked as regression because -17.565347295110854 (T) = (0 -49.46813840273708) / Math.Sqrt((7.920079201110455 / (30)) + (11.12025465017022 / (39))) is less than -1.9960083540247138 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (30) + (39) - 2, .025) and -0.35709294277888853 = (36.45154789578545 - 49.46813840273708) / 36.45154789578545 is less than -0.05.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```

### Docs

[Profiling workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/profiling-workflow-dotnet-runtime.md)
[Benchmarking workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/benchmarking-workflow-dotnet-runtime.md)

</details>



### Run Information

Architecture | x64
-- | --
OS | ubuntu 18.04
Baseline | [605d05ba54ccea0ff5486926a7dc630cee5db8cd](https://github.com/dotnet/runtime/commit/605d05ba54ccea0ff5486926a7dc630cee5db8cd)
Compare | [ef0241ed9316bc4343e715daca4d88c1ff90231b](https://github.com/dotnet/runtime/commit/ef0241ed9316bc4343e715daca4d88c1ff90231b)
Diff | [Diff](https://github.com/dotnet/runtime/compare/605d05ba54ccea0ff5486926a7dc630cee5db8cd...ef0241ed9316bc4343e715daca4d88c1ff90231b)


### Regressions in System.Numerics.Tests.Perf_BitOperations

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio | Baseline ETL | Compare ETL
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[Log2_uint - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 18.04_AOT=true_CompliationMode=wasm_RunKind=micro/System.Numerics.Tests.Perf_BitOperations.Log2_uint.html>) | 563.73 ns | 5.07 μs | 8.99 | 0.12 | False | | |
[TrailingZeroCount_ulong - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 18.04_AOT=true_CompliationMode=wasm_RunKind=micro/System.Numerics.Tests.Perf_BitOperations.TrailingZeroCount_ulong.html>) | 392.74 ns | 985.58 ns | 2.51 | 0.01 | False | | |
[PopCount_uint - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 18.04_AOT=true_CompliationMode=wasm_RunKind=micro/System.Numerics.Tests.Perf_BitOperations.PopCount_uint.html>) | 393.95 ns | 762.57 ns | 1.94 | 0.00 | False | | |
[TrailingZeroCount_uint - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 18.04_AOT=true_CompliationMode=wasm_RunKind=micro/System.Numerics.Tests.Perf_BitOperations.TrailingZeroCount_uint.html>) | 396.29 ns | 762.06 ns | 1.92 | 0.01 | False | | |
[Log2_ulong - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 18.04_AOT=true_CompliationMode=wasm_RunKind=micro/System.Numerics.Tests.Perf_BitOperations.Log2_ulong.html>) | 661.24 ns | 5.76 μs | 8.71 | 0.11 | False | | |
[PopCount_ulong - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 18.04_AOT=true_CompliationMode=wasm_RunKind=micro/System.Numerics.Tests.Perf_BitOperations.PopCount_ulong.html>) | 393.10 ns | 991.15 ns | 2.52 | 0.00 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_08_2023/refs/heads/main_x64_ubuntu%2018.04_AOT=true_CompliationMode=wasm_RunKind=micro_Regression/System.Numerics.Tests.Perf_BitOperations_1.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_08_2023/refs/heads/main_x64_ubuntu%2018.04_AOT=true_CompliationMode=wasm_RunKind=micro_Regression/System.Numerics.Tests.Perf_BitOperations_2.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_08_2023/refs/heads/main_x64_ubuntu%2018.04_AOT=true_CompliationMode=wasm_RunKind=micro_Regression/System.Numerics.Tests.Perf_BitOperations_3.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_08_2023/refs/heads/main_x64_ubuntu%2018.04_AOT=true_CompliationMode=wasm_RunKind=micro_Regression/System.Numerics.Tests.Perf_BitOperations_4.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_08_2023/refs/heads/main_x64_ubuntu%2018.04_AOT=true_CompliationMode=wasm_RunKind=micro_Regression/System.Numerics.Tests.Perf_BitOperations_5.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_08_2023/refs/heads/main_x64_ubuntu%2018.04_AOT=true_CompliationMode=wasm_RunKind=micro_Regression/System.Numerics.Tests.Perf_BitOperations_6.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_08_2023/refs/heads/main_x64_ubuntu%2018.04_AOT=true_CompliationMode=wasm_RunKind=micro_Regression/System.Numerics.Tests.Perf_BitOperations.html>)

### Repro
General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-e47c45a2-4ea6-41e2-90d8-db06d5d521c4264ac01aa6a4f28b8/26276bfe-86c3-4790-ab06-0610f2263acc.zip?sv=2021-08-06&se=2023-03-31T12%3A58%3A09Z&sr=c&sp=rl&sig=Tl%2F%2B5gr0Vsz6t2lxGBXdPB1h9hgs4NqE3wlSwvr097k%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-871f9744-2f00-448f-8af7-dfe6eeb359d28d3305937ba4f4298/f8f5857a-c103-4b77-8412-428575aabc43.zip?sv=2021-08-06&se=2023-03-31T23%3A03%3A11Z&sr=c&sp=rl&sig=aV7r8dwm4izeG9US4QZh7M9YjJHixCuJR37PC%2BiF6kc%3D>)

```cmd
git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Numerics.Tests.Perf_BitOperations*'
```

<details>

### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-e47c45a2-4ea6-41e2-90d8-db06d5d521c4264ac01aa6a4f28b8/26276bfe-86c3-4790-ab06-0610f2263acc.zip?sv=2021-08-06&se=2023-03-31T12%3A58%3A09Z&sr=c&sp=rl&sig=Tl%2F%2B5gr0Vsz6t2lxGBXdPB1h9hgs4NqE3wlSwvr097k%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-871f9744-2f00-448f-8af7-dfe6eeb359d28d3305937ba4f4298/f8f5857a-c103-4b77-8412-428575aabc43.zip?sv=2021-08-06&se=2023-03-31T23%3A03%3A11Z&sr=c&sp=rl&sig=aV7r8dwm4izeG9US4QZh7M9YjJHixCuJR37PC%2BiF6kc%3D>)
### Histogram

#### System.Numerics.Tests.Perf_BitOperations.Log2_uint

```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 5.068070551373357 > 590.4776095649311.
IsChangePoint: Marked as a change because one of 1/12/2023 3:42:01 AM, 3/1/2023 3:09:21 PM, 3/7/2023 7:56:26 PM falls between 2/26/2023 10:10:21 PM and 3/7/2023 7:56:26 PM.
IsRegressionStdDev: Marked as regression because -174.47162115911692 (T) = (0 -5134.6709385560725) / Math.Sqrt((2.129295899276432 / (30)) + (26099.15980276876 / (38))) is less than -1.9965644189515832 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (30) + (38) - 2, .025) and -8.13621135799764 = (562.0131515522891 - 5134.6709385560725) / 562.0131515522891 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.Numerics.Tests.Perf_BitOperations.TrailingZeroCount_ulong

```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 985.5805571480137 > 413.39812363644256.
IsChangePoint: Marked as a change because one of 1/12/2023 3:42:01 AM, 3/1/2023 3:09:21 PM, 3/7/2023 7:56:26 PM falls between 2/26/2023 10:10:21 PM and 3/7/2023 7:56:26 PM.
IsRegressionStdDev: Marked as regression because -1780.7560343152702 (T) = (0 -986.650709538981) / Math.Sqrt((1.0358434123149214 / (30)) + (2.9825231910354155 / (39))) is less than -1.9960083540247138 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (30) + (39) - 2, .025) and -1.5083019964203095 = (393.35403430171755 - 986.650709538981) / 393.35403430171755 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.Numerics.Tests.Perf_BitOperations.PopCount_uint

```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 762.5707871256872 > 414.27920255393366.
IsChangePoint: Marked as a change because one of 3/1/2023 3:09:21 PM, 3/7/2023 7:56:26 PM falls between 2/26/2023 10:10:21 PM and 3/7/2023 7:56:26 PM.
IsRegressionStdDev: Marked as regression because -819.3642406221456 (T) = (0 -763.8301086861795) / Math.Sqrt((4.258602725129243 / (29)) + (2.132076404945987 / (39))) is less than -1.9965644189515832 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (29) + (39) - 2, .025) and -0.9288043859507215 = (396.0122209643785 - 763.8301086861795) / 396.0122209643785 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.Numerics.Tests.Perf_BitOperations.TrailingZeroCount_uint

```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 762.059634245763 > 416.76240386667666.
IsChangePoint: Marked as a change because one of 1/12/2023 3:42:01 AM, 3/1/2023 3:09:21 PM, 3/7/2023 7:56:26 PM falls between 2/26/2023 10:10:21 PM and 3/7/2023 7:56:26 PM.
IsRegressionStdDev: Marked as regression because -769.6917580990686 (T) = (0 -762.9330275182712) / Math.Sqrt((4.816246841893949 / (30)) + (2.5027707526853127 / (39))) is less than -1.9960083540247138 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (30) + (39) - 2, .025) and -0.9165929101516619 = (398.06733264911196 - 762.9330275182712) / 398.06733264911196 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.Numerics.Tests.Perf_BitOperations.Log2_ulong

```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 5.7620901760057475 > 694.1558815702053.
IsChangePoint: Marked as a change because one of 1/12/2023 3:42:01 AM, 3/1/2023 3:09:21 PM, 3/7/2023 7:56:26 PM falls between 2/26/2023 10:10:21 PM and 3/7/2023 7:56:26 PM.
IsRegressionStdDev: Marked as regression because -115.0729870104527 (T) = (0 -5307.71323745104) / Math.Sqrt((2.3267998044654035 / (30)) + (63571.89594998186 / (39))) is less than -1.9960083540247138 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (30) + (39) - 2, .025) and -7.021789668906295 = (661.6619802466977 - 5307.71323745104) / 661.6619802466977 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.Numerics.Tests.Perf_BitOperations.PopCount_ulong

```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 991.1470007149413 > 412.91586513153925.
IsChangePoint: Marked as a change because one of 3/1/2023 3:09:21 PM, 3/7/2023 7:56:26 PM falls between 2/26/2023 10:10:21 PM and 3/7/2023 7:56:26 PM.
IsRegressionStdDev: Marked as regression because -1406.0311449078295 (T) = (0 -986.5106706700818) / Math.Sqrt((0.7114944230762575 / (29)) + (5.980295080109642 / (39))) is less than -1.9965644189515832 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (29) + (39) - 2, .025) and -1.5069297445718326 = (393.513489082069 - 986.5106706700818) / 393.513489082069 is less than -0.05.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```

### Docs

[Profiling workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/profiling-workflow-dotnet-runtime.md)
[Benchmarking workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/benchmarking-workflow-dotnet-runtime.md)

</details>



### Run Information

Architecture | x64
-- | --
OS | ubuntu 18.04
Baseline | [605d05ba54ccea0ff5486926a7dc630cee5db8cd](https://github.com/dotnet/runtime/commit/605d05ba54ccea0ff5486926a7dc630cee5db8cd)
Compare | [ef0241ed9316bc4343e715daca4d88c1ff90231b](https://github.com/dotnet/runtime/commit/ef0241ed9316bc4343e715daca4d88c1ff90231b)
Diff | [Diff](https://github.com/dotnet/runtime/compare/605d05ba54ccea0ff5486926a7dc630cee5db8cd...ef0241ed9316bc4343e715daca4d88c1ff90231b)


### Regressions in SIMD.RayTracerBench

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio | Baseline ETL | Compare ETL
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[Bench - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 18.04_AOT=true_CompliationMode=wasm_RunKind=micro/SIMD.RayTracerBench.Bench.html>) | 264.54 ms | 278.23 ms | 1.05 | 0.12 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_08_2023/refs/heads/main_x64_ubuntu%2018.04_AOT=true_CompliationMode=wasm_RunKind=micro_Regression/SIMD.RayTracerBench_1.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_08_2023/refs/heads/main_x64_ubuntu%2018.04_AOT=true_CompliationMode=wasm_RunKind=micro_Regression/SIMD.RayTracerBench.html>)

### Repro
General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-e47c45a2-4ea6-41e2-90d8-db06d5d521c4264ac01aa6a4f28b8/26276bfe-86c3-4790-ab06-0610f2263acc.zip?sv=2021-08-06&se=2023-03-31T12%3A58%3A09Z&sr=c&sp=rl&sig=Tl%2F%2B5gr0Vsz6t2lxGBXdPB1h9hgs4NqE3wlSwvr097k%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-871f9744-2f00-448f-8af7-dfe6eeb359d28d3305937ba4f4298/f8f5857a-c103-4b77-8412-428575aabc43.zip?sv=2021-08-06&se=2023-03-31T23%3A03%3A11Z&sr=c&sp=rl&sig=aV7r8dwm4izeG9US4QZh7M9YjJHixCuJR37PC%2BiF6kc%3D>)

```cmd
git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'SIMD.RayTracerBench*'
```

<details>

### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-e47c45a2-4ea6-41e2-90d8-db06d5d521c4264ac01aa6a4f28b8/26276bfe-86c3-4790-ab06-0610f2263acc.zip?sv=2021-08-06&se=2023-03-31T12%3A58%3A09Z&sr=c&sp=rl&sig=Tl%2F%2B5gr0Vsz6t2lxGBXdPB1h9hgs4NqE3wlSwvr097k%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-871f9744-2f00-448f-8af7-dfe6eeb359d28d3305937ba4f4298/f8f5857a-c103-4b77-8412-428575aabc43.zip?sv=2021-08-06&se=2023-03-31T23%3A03%3A11Z&sr=c&sp=rl&sig=aV7r8dwm4izeG9US4QZh7M9YjJHixCuJR37PC%2BiF6kc%3D>)
### Histogram

#### SIMD.RayTracerBench.Bench

```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 278.23386653333336 > 274.60366500875.
IsChangePoint: Marked as a change because one of 3/1/2023 3:09:21 PM, 3/7/2023 7:56:26 PM falls between 2/26/2023 10:10:21 PM and 3/7/2023 7:56:26 PM.
IsRegressionStdDev: Marked as regression because -12.046987083462755 (T) = (0 -283216617.77246165) / Math.Sqrt((22437991164822.406 / (30)) + (67962349326024.69 / (39))) is less than -1.9960083540247138 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (30) + (39) - 2, .025) and -0.07195918545318261 = (264204665.2669231 - 283216617.77246165) / 264204665.2669231 is less than -0.05.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```

### Docs

[Profiling workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/profiling-workflow-dotnet-runtime.md)
[Benchmarking workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/benchmarking-workflow-dotnet-runtime.md)

</details>



### Run Information

Architecture | x64
-- | --
OS | ubuntu 18.04
Baseline | [605d05ba54ccea0ff5486926a7dc630cee5db8cd](https://github.com/dotnet/runtime/commit/605d05ba54ccea0ff5486926a7dc630cee5db8cd)
Compare | [ef0241ed9316bc4343e715daca4d88c1ff90231b](https://github.com/dotnet/runtime/commit/ef0241ed9316bc4343e715daca4d88c1ff90231b)
Diff | [Diff](https://github.com/dotnet/runtime/compare/605d05ba54ccea0ff5486926a7dc630cee5db8cd...ef0241ed9316bc4343e715daca4d88c1ff90231b)


### Regressions in System.Collections.IndexerSetReverse&lt;String&gt;

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio | Baseline ETL | Compare ETL
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[Span - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 18.04_AOT=true_CompliationMode=wasm_RunKind=micro/System.Collections.IndexerSetReverse(String).Span(Size%3a%20512).html>) | 81.87 ns | 158.14 ns | 1.93 | 0.06 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_08_2023/refs/heads/main_x64_ubuntu%2018.04_AOT=true_CompliationMode=wasm_RunKind=micro_Regression/System.Collections.IndexerSetReverse(String)_1.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_08_2023/refs/heads/main_x64_ubuntu%2018.04_AOT=true_CompliationMode=wasm_RunKind=micro_Regression/System.Collections.IndexerSetReverse(String).html>)

### Repro
General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-e47c45a2-4ea6-41e2-90d8-db06d5d521c4264ac01aa6a4f28b8/26276bfe-86c3-4790-ab06-0610f2263acc.zip?sv=2021-08-06&se=2023-03-31T12%3A58%3A09Z&sr=c&sp=rl&sig=Tl%2F%2B5gr0Vsz6t2lxGBXdPB1h9hgs4NqE3wlSwvr097k%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-871f9744-2f00-448f-8af7-dfe6eeb359d28d3305937ba4f4298/f8f5857a-c103-4b77-8412-428575aabc43.zip?sv=2021-08-06&se=2023-03-31T23%3A03%3A11Z&sr=c&sp=rl&sig=aV7r8dwm4izeG9US4QZh7M9YjJHixCuJR37PC%2BiF6kc%3D>)

```cmd
git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Collections.IndexerSetReverse&lt;String&gt;*'
```

<details>

### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-e47c45a2-4ea6-41e2-90d8-db06d5d521c4264ac01aa6a4f28b8/26276bfe-86c3-4790-ab06-0610f2263acc.zip?sv=2021-08-06&se=2023-03-31T12%3A58%3A09Z&sr=c&sp=rl&sig=Tl%2F%2B5gr0Vsz6t2lxGBXdPB1h9hgs4NqE3wlSwvr097k%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-871f9744-2f00-448f-8af7-dfe6eeb359d28d3305937ba4f4298/f8f5857a-c103-4b77-8412-428575aabc43.zip?sv=2021-08-06&se=2023-03-31T23%3A03%3A11Z&sr=c&sp=rl&sig=aV7r8dwm4izeG9US4QZh7M9YjJHixCuJR37PC%2BiF6kc%3D>)
### Histogram

#### System.Collections.IndexerSetReverse&lt;String&gt;.Span(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 158.13722887851608 > 86.07958356953412.
IsChangePoint: Marked as a change because one of 3/1/2023 3:09:21 PM, 3/7/2023 7:56:26 PM falls between 2/26/2023 10:10:21 PM and 3/7/2023 7:56:26 PM.
IsRegressionStdDev: Marked as regression because -230.94519911821197 (T) = (0 -157.46604371176812) / Math.Sqrt((1.6813944950185855 / (29)) + (1.8704954154538767 / (39))) is less than -1.9965644189515832 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (29) + (39) - 2, .025) and -0.9133914642648328 = (82.2968256379622 - 157.46604371176812) / 82.2968256379622 is less than -0.05.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```

### Docs

[Profiling workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/profiling-workflow-dotnet-runtime.md)
[Benchmarking workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/benchmarking-workflow-dotnet-runtime.md)

</details>



### Run Information

Architecture | x64
-- | --
OS | ubuntu 18.04
Baseline | [605d05ba54ccea0ff5486926a7dc630cee5db8cd](https://github.com/dotnet/runtime/commit/605d05ba54ccea0ff5486926a7dc630cee5db8cd)
Compare | [ef0241ed9316bc4343e715daca4d88c1ff90231b](https://github.com/dotnet/runtime/commit/ef0241ed9316bc4343e715daca4d88c1ff90231b)
Diff | [Diff](https://github.com/dotnet/runtime/compare/605d05ba54ccea0ff5486926a7dc630cee5db8cd...ef0241ed9316bc4343e715daca4d88c1ff90231b)


### Regressions in System.Net.Primitives.Tests.IPAddressPerformanceTests

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio | Baseline ETL | Compare ETL
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[GetAddressBytes - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 18.04_AOT=true_CompliationMode=wasm_RunKind=micro/System.Net.Primitives.Tests.IPAddressPerformanceTests.GetAddressBytes(address%3a%201020%3a3040%3a5060%3a7080%3a9010%3a1112%3a1314%3a1516).html>) | 32.81 ns | 85.81 ns | 2.62 | 0.47 | False | | |
[Ctor_Span - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 18.04_AOT=true_CompliationMode=wasm_RunKind=micro/System.Net.Primitives.Tests.IPAddressPerformanceTests.Ctor_Span(address%3a%20%5b16%2c%2032%2c%2048%2c%2064%2c%2080%2c%20...%5d).html>) | 27.88 ns | 106.76 ns | 3.83 | 0.62 | False | | |
[TryWriteBytes - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 18.04_AOT=true_CompliationMode=wasm_RunKind=micro/System.Net.Primitives.Tests.IPAddressPerformanceTests.TryWriteBytes(address%3a%201020%3a3040%3a5060%3a7080%3a9010%3a1112%3a1314%3a1516).html>) | 30.17 ns | 83.28 ns | 2.76 | 0.59 | False | | |
[Ctor_Bytes - Duration of single invocation](<https://pvscmdupload.z22.web.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 18.04_AOT=true_CompliationMode=wasm_RunKind=micro/System.Net.Primitives.Tests.IPAddressPerformanceTests.Ctor_Bytes(address%3a%20%5b16%2c%2032%2c%2048%2c%2064%2c%2080%2c%20...%5d).html>) | 35.10 ns | 99.33 ns | 2.83 | 0.54 | False | | |

![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_08_2023/refs/heads/main_x64_ubuntu%2018.04_AOT=true_CompliationMode=wasm_RunKind=micro_Regression/System.Net.Primitives.Tests.IPAddressPerformanceTests_1.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_08_2023/refs/heads/main_x64_ubuntu%2018.04_AOT=true_CompliationMode=wasm_RunKind=micro_Regression/System.Net.Primitives.Tests.IPAddressPerformanceTests_2.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_08_2023/refs/heads/main_x64_ubuntu%2018.04_AOT=true_CompliationMode=wasm_RunKind=micro_Regression/System.Net.Primitives.Tests.IPAddressPerformanceTests_3.png>)
![graph](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_08_2023/refs/heads/main_x64_ubuntu%2018.04_AOT=true_CompliationMode=wasm_RunKind=micro_Regression/System.Net.Primitives.Tests.IPAddressPerformanceTests_4.png>)
[Test Report](<https://pvscmdupload.z22.web.core.windows.net/autofilereport/autofilereports/03_08_2023/refs/heads/main_x64_ubuntu%2018.04_AOT=true_CompliationMode=wasm_RunKind=micro_Regression/System.Net.Primitives.Tests.IPAddressPerformanceTests.html>)

### Repro
General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-e47c45a2-4ea6-41e2-90d8-db06d5d521c4264ac01aa6a4f28b8/26276bfe-86c3-4790-ab06-0610f2263acc.zip?sv=2021-08-06&se=2023-03-31T12%3A58%3A09Z&sr=c&sp=rl&sig=Tl%2F%2B5gr0Vsz6t2lxGBXdPB1h9hgs4NqE3wlSwvr097k%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-871f9744-2f00-448f-8af7-dfe6eeb359d28d3305937ba4f4298/f8f5857a-c103-4b77-8412-428575aabc43.zip?sv=2021-08-06&se=2023-03-31T23%3A03%3A11Z&sr=c&sp=rl&sig=aV7r8dwm4izeG9US4QZh7M9YjJHixCuJR37PC%2BiF6kc%3D>)

```cmd
git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Net.Primitives.Tests.IPAddressPerformanceTests*'
```

<details>

### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-e47c45a2-4ea6-41e2-90d8-db06d5d521c4264ac01aa6a4f28b8/26276bfe-86c3-4790-ab06-0610f2263acc.zip?sv=2021-08-06&se=2023-03-31T12%3A58%3A09Z&sr=c&sp=rl&sig=Tl%2F%2B5gr0Vsz6t2lxGBXdPB1h9hgs4NqE3wlSwvr097k%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-871f9744-2f00-448f-8af7-dfe6eeb359d28d3305937ba4f4298/f8f5857a-c103-4b77-8412-428575aabc43.zip?sv=2021-08-06&se=2023-03-31T23%3A03%3A11Z&sr=c&sp=rl&sig=aV7r8dwm4izeG9US4QZh7M9YjJHixCuJR37PC%2BiF6kc%3D>)
### Histogram

#### System.Net.Primitives.Tests.IPAddressPerformanceTests.GetAddressBytes(address: 1020:3040:5060:7080:9010:1112:1314:1516)

```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 85.80709392409577 > 37.17487266650631.
IsChangePoint: Marked as a change because one of 3/1/2023 3:09:21 PM, 3/7/2023 7:56:26 PM falls between 2/26/2023 10:10:21 PM and 3/7/2023 7:56:26 PM.
IsRegressionStdDev: Marked as regression because -54.34721839420134 (T) = (0 -89.51410323062314) / Math.Sqrt((5.68208174265619 / (30)) + (30.466003459880707 / (39))) is less than -1.9960083540247138 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (30) + (39) - 2, .025) and -1.4884219235465466 = (35.97223701640031 - 89.51410323062314) / 35.97223701640031 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.Net.Primitives.Tests.IPAddressPerformanceTests.Ctor_Span(address: [16, 32, 48, 64, 80, ...])

```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 106.75993455005616 > 28.909951048556067.
IsChangePoint: Marked as a change because one of 3/1/2023 3:09:21 PM, 3/7/2023 7:56:26 PM falls between 2/26/2023 10:10:21 PM and 3/7/2023 7:56:26 PM.
IsRegressionStdDev: Marked as regression because -63.22911949403745 (T) = (0 -94.17354292883925) / Math.Sqrt((4.847315333432165 / (30)) + (36.66677318412625 / (39))) is less than -1.9960083540247138 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (30) + (39) - 2, .025) and -2.386864095511788 = (27.805527553832572 - 94.17354292883925) / 27.805527553832572 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.Net.Primitives.Tests.IPAddressPerformanceTests.TryWriteBytes(address: 1020:3040:5060:7080:9010:1112:1314:1516)

```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 83.28338875001727 > 26.574624959354292.
IsChangePoint: Marked as a change because one of 3/1/2023 3:09:21 PM, 3/7/2023 7:56:26 PM falls between 2/26/2023 10:10:21 PM and 3/7/2023 7:56:26 PM.
IsRegressionStdDev: Marked as regression because -73.88415004942134 (T) = (0 -82.28313738745834) / Math.Sqrt((5.709251910682509 / (30)) + (16.354092329816343 / (39))) is less than -1.9960083540247138 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (30) + (39) - 2, .025) and -2.345576298810557 = (24.594607935473544 - 82.28313738745834) / 24.594607935473544 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.Net.Primitives.Tests.IPAddressPerformanceTests.Ctor_Bytes(address: [16, 32, 48, 64, 80, ...])

```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 99.32686038016432 > 33.51097992913993.
IsChangePoint: Marked as a change because one of 3/1/2023 3:09:21 PM, 3/7/2023 7:56:26 PM falls between 2/26/2023 10:10:21 PM and 3/7/2023 7:56:26 PM.
IsRegressionStdDev: Marked as regression because -81.3548538018689 (T) = (0 -97.93560255792029) / Math.Sqrt((3.450421306542092 / (30)) + (20.53673333631725 / (39))) is less than -1.9960083540247138 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (30) + (39) - 2, .025) and -1.9885229795121284 = (32.77057035509498 - 97.93560255792029) / 32.77057035509498 is less than -0.05.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```

### Docs

[Profiling workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/profiling-workflow-dotnet-runtime.md)
[Benchmarking workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/benchmarking-workflow-dotnet-runtime.md)

</details>




Architecture	x64
OS	ubuntu 18.04
Baseline	605d05ba54ccea0ff5486926a7dc630cee5db8cd
Compare	ef0241ed9316bc4343e715daca4d88c1ff90231b
Diff	Diff

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector
IndexerCheckLengthHoisting - Duration of single invocation	26.39 ns	41.83 ns	1.59	0.52	False
ToLower - Duration of single invocation	225.62 ns	353.43 ns	1.57	0.15	False
CtorCharCount - Duration of single invocation	59.70 ns	77.58 ns	1.30	0.32	False
PadLeft - Duration of single invocation	79.43 ns	103.09 ns	1.30	0.40	False
ToUpper - Duration of single invocation	224.64 ns	377.85 ns	1.68	0.16	False
ToUpperInvariant - Duration of single invocation	193.00 ns	306.12 ns	1.59	0.11	False
ToLowerInvariant - Duration of single invocation	205.16 ns	303.99 ns	1.48	0.10	False

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector
Log2_uint - Duration of single invocation	563.73 ns	5.07 μs	8.99	0.12	False
TrailingZeroCount_ulong - Duration of single invocation	392.74 ns	985.58 ns	2.51	0.01	False
PopCount_uint - Duration of single invocation	393.95 ns	762.57 ns	1.94	0.00	False
TrailingZeroCount_uint - Duration of single invocation	396.29 ns	762.06 ns	1.92	0.01	False
Log2_ulong - Duration of single invocation	661.24 ns	5.76 μs	8.71	0.11	False
PopCount_ulong - Duration of single invocation	393.10 ns	991.15 ns	2.52	0.00	False

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector
GetAddressBytes - Duration of single invocation	32.81 ns	85.81 ns	2.62	0.47	False
Ctor_Span - Duration of single invocation	27.88 ns	106.76 ns	3.83	0.62	False
TryWriteBytes - Duration of single invocation	30.17 ns	83.28 ns	2.76	0.59	False
Ctor_Bytes - Duration of single invocation	35.10 ns	99.33 ns	2.83	0.54	False

[Perf] Linux/x64: 29 Regressions on 3/1/2023 5:53:50 PM #13755

Description

Run Information

Regressions in System.Tests.Perf_String

Repro

Payloads

Payloads

Histogram

System.Tests.Perf_String.IndexerCheckLengthHoisting

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

Regressions in System.Text.Tests.Perf_Encoding

Repro

Payloads

Payloads

Histogram

System.Text.Tests.Perf_Encoding.GetByteCount(size: 16, encName: "utf-8")

Description of detection logic

Docs

Run Information

Regressions in System.Numerics.Tests.Perf_BitOperations

Repro

Payloads

Payloads

Histogram

System.Numerics.Tests.Perf_BitOperations.Log2_uint

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 SIMD.RayTracerBench

Repro

Payloads

Payloads

Histogram

SIMD.RayTracerBench.Bench

Description of detection logic

Docs

Run Information

Regressions in System.Collections.IndexerSetReverse<String>

Repro

Payloads

Payloads

Histogram

System.Collections.IndexerSetReverse<String>.Span(Size: 512)

Description of detection logic

Docs

Run Information

Regressions in System.Net.Primitives.Tests.IPAddressPerformanceTests

Repro

Payloads

Payloads

Histogram

System.Net.Primitives.Tests.IPAddressPerformanceTests.GetAddressBytes(address: 1020:3040:5060:7080:9010:1112:1314:1516)

Description of detection logic

Description of detection logic

Description of detection logic

Description of detection logic

Docs

Metadata

Metadata

Assignees

Labels

Type

Projects

Milestone

Relationships

Development

Issue actions