[Perf] Windows/x86: 5 Regressions on 2/26/2026 8:35:58 PM +00:00

### Run Information

Name | Value
-- | --
Architecture | x86
OS | Windows 10.0.22631
Queue | ViperWindows
Baseline | [eae0a64e4c28b1a692c02650a8d15d6383a6e72b](https://github.com/dotnet/runtime/commit/eae0a64e4c28b1a692c02650a8d15d6383a6e72b)
Compare | [de761a5e0a7bd363b5eb119260acfc8da4e9608c](https://github.com/dotnet/runtime/commit/de761a5e0a7bd363b5eb119260acfc8da4e9608c)
Diff | [Diff](https://github.com/dotnet/runtime/compare/eae0a64e4c28b1a692c02650a8d15d6383a6e72b...de761a5e0a7bd363b5eb119260acfc8da4e9608c)
Configs | CompilationMode:tiered, RunKind:micro

### Regressions in System.Collections.TryGetValueFalse<Int32, Int32>

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

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

| 6.87 μs | 7.93 μs | 1.15 | 0.52 | False | | |
|

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

| 2.63 μs | 3.04 μs | 1.16 | 0.28 | False | | |

[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
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Collections.TryGetValueFalse*'
```

### System.Collections.TryGetValueFalse<Int32, Int32>.SortedList(Size: 512)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Collections.TryGetValueFalse<Int32, Int32>.IDictionary(Size: 512)

#### 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 | x86
OS | Windows 10.0.22631
Queue | ViperWindows
Baseline | [d63c175469bcaa3f3d5bc73aa6fd108bbf00797b](https://github.com/dotnet/runtime/commit/d63c175469bcaa3f3d5bc73aa6fd108bbf00797b)
Compare | [de761a5e0a7bd363b5eb119260acfc8da4e9608c](https://github.com/dotnet/runtime/commit/de761a5e0a7bd363b5eb119260acfc8da4e9608c)
Diff | [Diff](https://github.com/dotnet/runtime/compare/d63c175469bcaa3f3d5bc73aa6fd108bbf00797b...de761a5e0a7bd363b5eb119260acfc8da4e9608c)
Configs | CompilationMode:tiered, RunKind:micro

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

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

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

| 22.92 ns | 29.23 ns | 1.28 | 0.32 | False | | |
|

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

| 115.32 ns | 136.05 ns | 1.18 | 0.13 | False | | |
|

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

| 113.45 ns | 140.66 ns | 1.24 | 0.13 | False | | |

[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
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Text.Json.Serialization.Tests.WriteJson*'
```

### System.Text.Json.Serialization.Tests.WriteJson<Int32>.SerializeToWriter(Mode: SourceGen)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Text.Json.Serialization.Tests.WriteJson<Int32>.SerializeToStream(Mode: SourceGen)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Text.Json.Serialization.Tests.WriteJson<Int32>.SerializeToStream(Mode: 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)