[Perf] Linux/x64: 2 Regressions on 7/11/2026 9:16:51 AM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [4a6c691f97cd93b08ef0794d297de622e4409e66](https://github.com/dotnet/sdk/commit/4a6c691f97cd93b08ef0794d297de622e4409e66)
Compare | [50dbab4de210e882172b07934e9666313b7065f1](https://github.com/dotnet/sdk/commit/50dbab4de210e882172b07934e9666313b7065f1)
Diff | [Diff](https://github.com/dotnet/sdk/compare/4a6c691f97cd93b08ef0794d297de622e4409e66...50dbab4de210e882172b07934e9666313b7065f1)
Configs | CompilationMode:tiered, RunKind:bepuphysics

### Regressions in DemoBenchmarks.TwoBodyConstraintBenchmarks

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

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

| 45.21 μs | 60.50 μs | 1.34 | 0.00 | True | | |
|

• [Contact4 - Duration of single invocation]()
• 📝 - [Benchmark Source]()
• [ADX - Test Multi Config Graph]()

| 295.34 μs | 392.81 μs | 1.33 | 0.00 | True | | |

![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 'DemoBenchmarks.TwoBodyConstraintBenchmarks*'
```

### DemoBenchmarks.TwoBodyConstraintBenchmarks.AngularSwivelHinge

#### ETL Files

#### Histogram

#### JIT Disasms

### DemoBenchmarks.TwoBodyConstraintBenchmarks.Contact4

#### 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 src/benchmarks/real-world/bepuphysics2/TwoBodyConstraintBenchmarks.cs at the cited benchmark ranges, then run the benchmarks_ci.py command from the Repro section. Compare the AngularSwivelHinge and Contact4 results with the linked baseline and test commits; done means the reported regressions are explained and the affected benchmarks no longer regress.

Written by the indexing model from the issue text.