[Perf] Linux/x64: 4 Improvements on 7/29/2026 2:14:39 AM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [65b0190679e7afaea3c09bcfc474c55414403972](https://github.com/dotnet/runtime/commit/65b0190679e7afaea3c09bcfc474c55414403972)
Compare | [ba10a6ee8aa80fce1bb3e40b57b2b941102107c9](https://github.com/dotnet/runtime/commit/ba10a6ee8aa80fce1bb3e40b57b2b941102107c9)
Diff | [Diff](https://github.com/dotnet/runtime/compare/65b0190679e7afaea3c09bcfc474c55414403972...ba10a6ee8aa80fce1bb3e40b57b2b941102107c9)
Configs | CompilationMode:wasm, RunKind:micro

### Improvements in System.Text.Json.Serialization.Tests.ReadMissingAndCaseInsensitive<Location>

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|

• [CaseInsensitiveNotMatching - Duration of single invocation]()
• 📝 - [Benchmark Source]()
• [ADX - Test Multi Config Graph]()

| 20.32 μs | 12.07 μs | 0.59 | 0.14 | False | | |
|

• [Baseline - Duration of single invocation]()
• 📝 - [Benchmark Source]()
• [ADX - Test Multi Config Graph]()

| 20.69 μs | 12.38 μs | 0.60 | 0.12 | False | | |
|

• [CaseInsensitiveMatching - Duration of single invocation]()
• 📝 - [Benchmark Source]()
• [ADX - Test Multi Config Graph]()

| 20.78 μs | 12.62 μs | 0.61 | 0.16 | False | | |

![graph]()
![graph]()
![graph]()
[Test Report]()

### Repro
General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

```cmd
git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Text.Json.Serialization.Tests.ReadMissingAndCaseInsensitive*'
```

### System.Text.Json.Serialization.Tests.ReadMissingAndCaseInsensitive<Location>.CaseInsensitiveNotMatching

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Text.Json.Serialization.Tests.ReadMissingAndCaseInsensitive<Location>.Baseline

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Text.Json.Serialization.Tests.ReadMissingAndCaseInsensitive<Location>.CaseInsensitiveMatching

#### ETL Files

#### Histogram

#### JIT Disasms

### 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)

---

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [65b0190679e7afaea3c09bcfc474c55414403972](https://github.com/dotnet/runtime/commit/65b0190679e7afaea3c09bcfc474c55414403972)
Compare | [ba10a6ee8aa80fce1bb3e40b57b2b941102107c9](https://github.com/dotnet/runtime/commit/ba10a6ee8aa80fce1bb3e40b57b2b941102107c9)
Diff | [Diff](https://github.com/dotnet/runtime/compare/65b0190679e7afaea3c09bcfc474c55414403972...ba10a6ee8aa80fce1bb3e40b57b2b941102107c9)
Configs | CompilationMode:wasm, RunKind:micro

### Improvements in MicroBenchmarks.Serializers.Json_ToString<LoginViewModel>

Benchmark | Baseline | Test | Test/Base | Test Quality | Edge Detector | Baseline IR | Compare IR | IR Ratio
-- | -- | -- | -- | -- | -- | -- | -- | --
|

• [SystemTextJson_Reflection_ - Duration of single invocation]()
• 📝 - [Benchmark Source]()
• [ADX - Test Multi Config Graph]()

| 5.43 μs | 3.71 μs | 0.68 | 0.13 | False | | |

![graph]()
[Test Report]()

### Repro
General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

```cmd
git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'MicroBenchmarks.Serializers.Json_ToString*'
```

### MicroBenchmarks.Serializers.Json_ToString<LoginViewModel>.SystemTextJson_Reflection_

#### ETL Files

#### Histogram

#### JIT Disasms

### 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)

Start with the benchmark sources src/benchmarks/micro/libraries/System.Text.Json/Serializer/ReadMissingAndCaseInsensitive.cs and src/benchmarks/micro/Serializers/Json_ToString.cs, then run scripts/benchmarks_ci.py with the filters shown in the issue. Compare the reported Linux/x64 WASM results with the linked baseline and test commits; done means the performance change is investigated and validated against the benchmark reports.

Written by the indexing model from the issue text.