[Perf] Regressions related to JSON Source Generators

### Run Information

Architecture | x64
-- | --
OS | Windows 10.0.18362
Baseline | [8093c52a9a4abde623c1bf8b74334f11030847f2](https://github.com/dotnet/runtime/commit/8093c52a9a4abde623c1bf8b74334f11030847f2)
Compare | [9b364cf02c4a715c5eebba794766fc982960eeef](https://github.com/dotnet/runtime/commit/9b364cf02c4a715c5eebba794766fc982960eeef)
Diff | [Diff](https://github.com/dotnet/runtime/compare/8093c52a9a4abde623c1bf8b74334f11030847f2...9b364cf02c4a715c5eebba794766fc982960eeef)


### Regressions in System.Text.Json.Serialization.Tests.ReadJson&lt;Int32&gt;

Benchmark | Baseline | Test | Test/Base | Test Quality | Baseline IR | Compare IR | IR Ratio | Baseline ETL | Compare ETL
-- | -- | -- | -- | -- | -- | -- | -- | -- | --
[DeserializeFromString - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_x64_Windows 10.0.18362/System.Text.Json.Serialization.Tests.ReadJson(Int32).DeserializeFromString.html>) | 165.80 ns | 177.44 ns | 1.07 | 0.05 | | |

![graph](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/04_26_2021/refs/heads/main_x64_Windows%2010.0.18362_Regression/System.Text.Json.Serialization.Tests.ReadJson(Int32)_1.png>)
[Historical Data in Reporting System](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/04_26_2021/refs/heads/main_x64_Windows%2010.0.18362_Regression/System.Text.Json.Serialization.Tests.ReadJson(Int32).html>)

### Repro

```cmd
git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_ci.py -f netcoreapp5.0 --filter 'System.Text.Json.Serialization.Tests.ReadJson&lt;Int32&gt;*'
```
<details>

### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-1d294f66-0356-4f14-bfa7-6c04630ea08cb795c6ad45f46deb9/f0a82038-bc0b-4a29-b816-20156d6aa6b9.zip?sv=2019-07-07&se=2021-05-18T04%3A13%3A07Z&sr=c&sp=rl&sig=92vRKfGmUDJFr048e0kB2g49XEgH%2BRH0iNua0VImG6o%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-6212c436-43ba-440c-a289-74c0648481ff637e762178447bc9b/d19d1982-cb4d-4746-a695-f06c578be713.zip?sv=2019-07-07&se=2021-05-19T13%3A21%3A29Z&sr=c&sp=rl&sig=xoWhu4D1UtNm3rEt3S4Ugb0kvpPiInQ1PRCYiA6u1pc%3D>)

### Histogram
#### System.Text.Json.Serialization.Tests.ReadJson&lt;Int32&gt;.DeserializeFromString

```log

```


### 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 | Windows 10.0.18362
Baseline | [ddaa1c3c503f989db48102f50a693765e4e6ae2a](https://github.com/dotnet/runtime/commit/ddaa1c3c503f989db48102f50a693765e4e6ae2a)
Compare | [8c3180d932146b1a76600601c03082c6a81e1a53](https://github.com/dotnet/runtime/commit/8c3180d932146b1a76600601c03082c6a81e1a53)
Diff | [Diff](https://github.com/dotnet/runtime/compare/ddaa1c3c503f989db48102f50a693765e4e6ae2a...8c3180d932146b1a76600601c03082c6a81e1a53)


### Regressions in System.Text.Json.Serialization.Tests.WriteJson&lt;Int32&gt;

Benchmark | Baseline | Test | Test/Base | Test Quality | Baseline IR | Compare IR | IR Ratio | Baseline ETL | Compare ETL
-- | -- | -- | -- | -- | -- | -- | -- | -- | --
[SerializeToString - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_x64_Windows 10.0.18362/System.Text.Json.Serialization.Tests.WriteJson(Int32).SerializeToString.html>) | 183.15 ns | 209.11 ns | 1.14 | 0.04 | | |

![graph](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/04_26_2021/refs/heads/main_x64_Windows%2010.0.18362_Regression/System.Text.Json.Serialization.Tests.WriteJson(Int32)_1.png>)
[Historical Data in Reporting System](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/04_26_2021/refs/heads/main_x64_Windows%2010.0.18362_Regression/System.Text.Json.Serialization.Tests.WriteJson(Int32).html>)

### Repro

```cmd
git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_ci.py -f netcoreapp5.0 --filter 'System.Text.Json.Serialization.Tests.WriteJson&lt;Int32&gt;*'
```
<details>

### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-a75b0c24-115e-41f4-8a38-4039cd481427e31911255db4f4fa5/5299d9d6-121e-4bc8-af75-22c23a5b5fc3.zip?sv=2019-07-07&se=2021-05-20T15%3A30%3A29Z&sr=c&sp=rl&sig=NhX8b8NdNzAr38thS1causVJXHoHg64xUo%2FBm4ZwJ2E%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-839bbfd3-efdb-46a4-862b-b8d00741a71b2864515457248e4a8/d4489adc-3af0-4ff0-8adb-81c63a1d11dc.zip?sv=2019-07-07&se=2021-05-21T05%3A44%3A36Z&sr=c&sp=rl&sig=ldI3sFGHXSoi7bgSPybdX4n9vb0GCHCpXXfXxVfQqiI%3D>)

### Histogram
#### System.Text.Json.Serialization.Tests.WriteJson&lt;Int32&gt;.SerializeToString

```log

```


### 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 | [94d41d70d7038d94149d485a0f153eb8012859b3](https://github.com/dotnet/runtime/commit/94d41d70d7038d94149d485a0f153eb8012859b3)
Compare | [08e00bea231ad8e5afa83fc9d4e74ed667f16997](https://github.com/dotnet/runtime/commit/08e00bea231ad8e5afa83fc9d4e74ed667f16997)
Diff | [Diff](https://github.com/dotnet/runtime/compare/94d41d70d7038d94149d485a0f153eb8012859b3...08e00bea231ad8e5afa83fc9d4e74ed667f16997)


### Regressions in System.Text.Json.Serialization.Tests.ReadJson&lt;Int32&gt;

Benchmark | Baseline | Test | Test/Base | Test Quality | 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(Int32).DeserializeFromUtf8Bytes.html>) | 82.12 ns | 86.61 ns | 1.05 | 0.01 | | |

![graph](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/05_03_2021/refs/heads/main_x64_ubuntu%2018.04_Regression/System.Text.Json.Serialization.Tests.ReadJson(Int32)_1.png>)
[Historical Data in Reporting System](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/05_03_2021/refs/heads/main_x64_ubuntu%2018.04_Regression/System.Text.Json.Serialization.Tests.ReadJson(Int32).html>)

### Repro

```cmd
git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f netcoreapp5.0 --filter 'System.Text.Json.Serialization.Tests.ReadJson&lt;Int32&gt;*'
```
<details>

### Payloads

[Baseline](<>)
[Compare](<>)

### Histogram
#### System.Text.Json.Serialization.Tests.ReadJson&lt;Int32&gt;.DeserializeFromUtf8Bytes

```log

```


### 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 | [508e56025f66f5c2c00a8f1902816959bb61e0ac](https://github.com/dotnet/runtime/commit/508e56025f66f5c2c00a8f1902816959bb61e0ac)
Compare | [65bcecebde4aebd5926952ccfc4dc8e7fbf7eaed](https://github.com/dotnet/runtime/commit/65bcecebde4aebd5926952ccfc4dc8e7fbf7eaed)
Diff | [Diff](https://github.com/dotnet/runtime/compare/508e56025f66f5c2c00a8f1902816959bb61e0ac...65bcecebde4aebd5926952ccfc4dc8e7fbf7eaed)


### Regressions in System.Text.Json.Serialization.Tests.WriteJson&lt;Int32&gt;

Benchmark | Baseline | Test | Test/Base | Test Quality | Baseline IR | Compare IR | IR Ratio | Baseline ETL | Compare ETL
-- | -- | -- | -- | -- | -- | -- | -- | -- | --
[SerializeToString - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_x64_ubuntu 18.04/System.Text.Json.Serialization.Tests.WriteJson(Int32).SerializeToString.html>) | 141.11 ns | 158.72 ns | 1.12 | 0.15 | | |

![graph](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/04_26_2021/refs/heads/main_x64_ubuntu%2018.04_Regression/System.Text.Json.Serialization.Tests.WriteJson(Int32)_1.png>)
[Historical Data in Reporting System](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/04_26_2021/refs/heads/main_x64_ubuntu%2018.04_Regression/System.Text.Json.Serialization.Tests.WriteJson(Int32).html>)

### Repro

```cmd
git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f netcoreapp5.0 --filter 'System.Text.Json.Serialization.Tests.WriteJson&lt;Int32&gt;*'
```
<details>

### Payloads

[Baseline](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-92d8e263-192b-47a0-b0fc-f8e4663a7132d09c7450b0549b1b2/1e2ad9f0-c937-4f2c-9688-188d1722bc26.zip?sv=2019-07-07&se=2021-05-20T19%3A49%3A56Z&sr=c&sp=rl&sig=aZ5UfiTXxlahVaZNkLNcwOBD6Kl0uNtmCtuZQUU7eXk%3D>)
[Compare](<https://helixdi107v0xdeko0k025g8.blob.core.windows.net/helix-job-e75ce71e-be15-43a4-8c4e-493d688ea41a1177a1f74b64d6ea5/5cf6e11a-0934-4d76-8207-2c96c5667758.zip?sv=2019-07-07&se=2021-05-21T11%3A31%3A07Z&sr=c&sp=rl&sig=61hIA8%2BKm%2FoP6aoNVdJtuEVpDHpuoQC90ER0Mso%2FNhc%3D>)

### Histogram
#### System.Text.Json.Serialization.Tests.WriteJson&lt;Int32&gt;.SerializeToString

```log

```


### 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 | Windows 10.0.18362
Baseline | [a5e626a015a37cf332e993804cd8bb42943c14c2](https://github.com/dotnet/runtime/commit/a5e626a015a37cf332e993804cd8bb42943c14c2)
Compare | [6b71dd24ff84c7aca11f791c614bf24acb04db83](https://github.com/dotnet/runtime/commit/6b71dd24ff84c7aca11f791c614bf24acb04db83)
Diff | [Diff](https://github.com/dotnet/runtime/compare/a5e626a015a37cf332e993804cd8bb42943c14c2...6b71dd24ff84c7aca11f791c614bf24acb04db83)


### Regressions in System.Text.Json.Serialization.Tests.WriteJson&lt;HashSet&lt;String&gt;&gt;

Benchmark | Baseline | Test | Test/Base | Test Quality | Baseline IR | Compare IR | IR Ratio | Baseline ETL | Compare ETL
-- | -- | -- | -- | -- | -- | -- | -- | -- | --
[SerializeObjectProperty - Duration of single invocation](<https://pvscmdupload.blob.core.windows.net/reports/allTestHistory/refs/heads/main_x64_Windows 10.0.18362/System.Text.Json.Serialization.Tests.WriteJson(HashSet(String)).SerializeObjectProperty.html>) | 8.67 μs | 9.52 μs | 1.10 | 0.06 | | |

![graph](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/05_04_2021/refs/heads/main_x64_Windows%2010.0.18362_Regression/System.Text.Json.Serialization.Tests.WriteJson(HashSet(String))_1.png>)
[Historical Data in Reporting System](<https://pvscmdupload.blob.core.windows.net/autofilereport/autofilereports/05_04_2021/refs/heads/main_x64_Windows%2010.0.18362_Regression/System.Text.Json.Serialization.Tests.WriteJson(HashSet(String)).html>)

### Repro

```cmd
git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_ci.py -f netcoreapp5.0 --filter 'System.Text.Json.Serialization.Tests.WriteJson&lt;HashSet&lt;String&gt;&gt;*'
```
<details>

### Payloads

[Baseline](<>)
[Compare](<>)

### Histogram
#### System.Text.Json.Serialization.Tests.WriteJson&lt;HashSet&lt;String&gt;&gt;.SerializeObjectProperty

```log

```


### 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	Windows 10.0.18362
Baseline	8093c52a9a4abde623c1bf8b74334f11030847f2
Compare	9b364cf02c4a715c5eebba794766fc982960eeef
Diff	Diff

Architecture	x64
OS	Windows 10.0.18362
Baseline	ddaa1c3c503f989db48102f50a693765e4e6ae2a
Compare	8c3180d932146b1a76600601c03082c6a81e1a53
Diff	Diff

Architecture	x64
OS	ubuntu 18.04
Baseline	94d41d70d7038d94149d485a0f153eb8012859b3
Compare	08e00bea231ad8e5afa83fc9d4e74ed667f16997
Diff	Diff

Architecture	x64
OS	ubuntu 18.04
Baseline	508e56025f66f5c2c00a8f1902816959bb61e0ac
Compare	65bcecebde4aebd5926952ccfc4dc8e7fbf7eaed
Diff	Diff

Architecture	x64
OS	Windows 10.0.18362
Baseline	a5e626a015a37cf332e993804cd8bb42943c14c2
Compare	6b71dd24ff84c7aca11f791c614bf24acb04db83
Diff	Diff

Uh oh!

[Perf] Regressions related to JSON Source Generators #52311

Description

Run Information

Regressions in System.Text.Json.Serialization.Tests.ReadJson<Int32>

Repro

Payloads

Histogram

System.Text.Json.Serialization.Tests.ReadJson<Int32>.DeserializeFromString

Docs

Run Information

Regressions in System.Text.Json.Serialization.Tests.WriteJson<Int32>

Repro

Payloads

Histogram

System.Text.Json.Serialization.Tests.WriteJson<Int32>.SerializeToString

Docs

Run Information

Regressions in System.Text.Json.Serialization.Tests.ReadJson<Int32>

Repro

Payloads

Histogram

System.Text.Json.Serialization.Tests.ReadJson<Int32>.DeserializeFromUtf8Bytes

Docs

Regressions in System.Text.Json.Serialization.Tests.WriteJson<Int32>

Repro

Payloads

Histogram

System.Text.Json.Serialization.Tests.WriteJson<Int32>.SerializeToString

Docs

Run Information

Regressions in System.Text.Json.Serialization.Tests.WriteJson<HashSet<String>>

Repro

Payloads

Histogram

System.Text.Json.Serialization.Tests.WriteJson<HashSet<String>>.SerializeObjectProperty

Docs

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