Regressions in System.Text.Json.Serialization.Tests.ReadJson<Hashtable>

### Run Information

Architecture | x64
-- | --
OS | ubuntu 18.04
Baseline | [783e260c78f87dda7cd88b2d8d6305c742e0f78d](https://github.com/dotnet/runtime/commit/783e260c78f87dda7cd88b2d8d6305c742e0f78d)
Compare | [1665aca8f09eba553c8e411a8c01105d71dcabbf](https://github.com/dotnet/runtime/commit/1665aca8f09eba553c8e411a8c01105d71dcabbf)
Diff | [Diff](https://github.com/dotnet/runtime/compare/783e260c78f87dda7cd88b2d8d6305c742e0f78d...1665aca8f09eba553c8e411a8c01105d71dcabbf)


### Regressions in System.Text.Json.Serialization.Tests.ReadJson&lt;Hashtable&gt;

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio | Baseline ETL | Compare ETL
-- | -- | -- | -- | -- | -- | -- | -- | -- | -- | --
[DeserializeFromUtf8Bytes - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 18.04/System.Text.Json.Serialization.Tests.ReadJson(Hashtable).DeserializeFromUtf8Bytes.html>) | 34.65 μs | 42.03 μs | 1.21 | 0.02 | True | | |

![graph](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/03_08_2022/refs/heads/main_x64_ubuntu%2018.04_Regression/System.Text.Json.Serialization.Tests.ReadJson(Hashtable)_1.png>)
[Test Report](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/03_08_2022/refs/heads/main_x64_ubuntu%2018.04_Regression/System.Text.Json.Serialization.Tests.ReadJson(Hashtable).html>)

### Repro

```cmd
git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net6.0 --filter 'System.Text.Json.Serialization.Tests.ReadJson&lt;Hashtable&gt;*'
```
<details>

### Payloads

[Baseline](<https://helixdi8s23ayyeko0k025g8.blob.core.windows.net/helix-job-754b8fa9-c50b-4581-b649-3a3bcad081c7632ee4821dc414ea0/6f722511-deab-4036-81a4-72bf3b970504.zip?sv=2019-07-07&se=2022-03-31T09%3A36%3A12Z&sr=c&sp=rl&sig=pae5yScM4YLknqZ8iNI%2BXS%2BGD4pz8G08%2F527LZkHRbo%3D>)
[Compare](<https://helixdi8s23ayyeko0k025g8.blob.core.windows.net/helix-job-cee20011-e6ac-4c17-a004-b098b776313076e0672a79145e68c/338fd12a-a83d-41ff-acb6-c92372430695.zip?sv=2019-07-07&se=2022-03-31T18%3A15%3A39Z&sr=c&sp=rl&sig=eqGSLm1qkMkU%2FURvP2OKNqX8MWapAfRclBCDh3TCbso%3D>)
### Histogram

#### System.Text.Json.Serialization.Tests.ReadJson&lt;Hashtable&gt;.DeserializeFromUtf8Bytes

```log

```
### Description of detection logic
```IsRegressionBase: Marked as regression because the compare was 5% greater than the baseline, and the value was not too small.
IsRegressionChecked: Marked as regression because the three check build points were 0.05 greater than the baseline.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
IsRegressionBase: Marked as regression because the compare was 5% greater than the baseline, and the value was not too small.
IsRegressionChecked: Marked as regression because the three check build points were 0.05 greater than the baseline.
IsRegressionWindowed: Marked as regression because 42.02635741300213 > 36.362182159171695.
IsChangePoint: Marked as a change because one of 3/1/2022 11:44:08 AM, 3/8/2022 2:08:40 PM falls between 2/27/2022 3:52:50 PM and 3/8/2022 2:08:40 PM.
IsRegressionStdDev: Marked as regression because -58.688617384345434 (T) = (0 -41789.89683683401) / Math.Sqrt((174960.4880672375 / (24)) + (276089.457963497 / (41))) is less than -1.9983405425199077 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (24) + (41) - 2, .025) and -0.19948594027648228 = (34839.838828958185 - 41789.89683683401) / 34839.838828958185 is less than -0.05.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
IsChangeEdgeDetector: Marked as regression because Edge Detector said so.

```

### Docs

[Profiling workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/profiling-workflow-dotnet-runtime.md)
[Benchmarking workflow for dotnet/runtime repository](https://github.com/dotnet/performance/blob/master/docs/benchmarking-workflow-dotnet-runtime.md)

</details>


Provide feedback

Saved searches

Use saved searches to filter your results more quickly

Uh oh!

Uh oh!

Regressions in System.Text.Json.Serialization.Tests.ReadJson<Hashtable> #66341

Run Information