[Perf] Linux/x64: 4 Regressions on 5/18/2026 7:17:35 PM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [b540c365da5e5f71a6c0389f5764f363bc59d4a2](https://github.com/dotnet/runtime/commit/b540c365da5e5f71a6c0389f5764f363bc59d4a2)
Compare | [5fe0d4923d742a55079b3016f38e91e2c1b58663](https://github.com/dotnet/runtime/commit/5fe0d4923d742a55079b3016f38e91e2c1b58663)
Diff | [Diff](https://github.com/dotnet/runtime/compare/b540c365da5e5f71a6c0389f5764f363bc59d4a2...5fe0d4923d742a55079b3016f38e91e2c1b58663)
Configs | AOT:true, CompilationMode:wasm, RunKind:micro

### Regressions in System.Tests.Perf_Type

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

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

| 1.85 μs | 2.15 μs | 1.16 | 0.05 | False | | |
|

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

| 1.86 μs | 2.14 μs | 1.15 | 0.02 | False | | |
|

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

| 5.86 μs | 6.32 μs | 1.08 | 0.01 | False | | |
|

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

| 5.50 μs | 5.86 μs | 1.07 | 0.01 | False | | |

![graph]()
![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.Tests.Perf_Type*'
```

### System.Tests.Perf_Type.GetType_NonFullyQualifiedNames(input: "System.Int32[*]")

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Tests.Perf_Type.GetType_NonFullyQualifiedNames(input: "System.Int32[,]")

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Tests.Perf_Type.GetType_FullyQualifiedNames(input: typeof(System.Collections.Generic.Dictionary`2[]))

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Tests.Perf_Type.GetType_FullyQualifiedNames(input: typeof(System.Tests.NestedGeneric<String, Boolean>))

#### 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)