[Perf] Linux/x64: 2 Regressions on 1/22/2026 10:40:20 AM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [2cd0cc89e2bdbcaa804c93a36adefa055d851c40](https://github.com/dotnet/runtime/commit/2cd0cc89e2bdbcaa804c93a36adefa055d851c40)
Compare | [0f61adc266b63df30e3e3136008567cc7d9077b9](https://github.com/dotnet/runtime/commit/0f61adc266b63df30e3e3136008567cc7d9077b9)
Diff | [Diff](https://github.com/dotnet/runtime/compare/2cd0cc89e2bdbcaa804c93a36adefa055d851c40...0f61adc266b63df30e3e3136008567cc7d9077b9)
Configs | CompilationMode:tiered, RunKind:micro

### Regressions in System.Net.Primitives.Tests.CredentialCacheTests

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

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

| 37.13 ns | 43.46 ns | 1.17 | 0.15 | 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 'System.Net.Primitives.Tests.CredentialCacheTests*'
```

### System.Net.Primitives.Tests.CredentialCacheTests.GetCredential_HostPort(host: "notfound", hostPortCount: 10)

#### 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 | [2cd0cc89e2bdbcaa804c93a36adefa055d851c40](https://github.com/dotnet/runtime/commit/2cd0cc89e2bdbcaa804c93a36adefa055d851c40)
Compare | [0f61adc266b63df30e3e3136008567cc7d9077b9](https://github.com/dotnet/runtime/commit/0f61adc266b63df30e3e3136008567cc7d9077b9)
Diff | [Diff](https://github.com/dotnet/runtime/compare/2cd0cc89e2bdbcaa804c93a36adefa055d851c40...0f61adc266b63df30e3e3136008567cc7d9077b9)
Configs | CompilationMode:tiered, RunKind:micro

### Regressions in System.Collections.ContainsTrue<String>

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

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

| 114.98 μs | 157.39 μs | 1.37 | 0.32 | 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 'System.Collections.ContainsTrue*'
```

### System.Collections.ContainsTrue<String>.ICollection(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)