[Perf] Linux/x64: 4 Regressions on 7/15/2026 9:14:38 AM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [9b4d3b99c89873c850b8ec1f7fd4b66d9eb6e3e2](https://github.com/dotnet/sdk/commit/9b4d3b99c89873c850b8ec1f7fd4b66d9eb6e3e2)
Compare | [ecc427bc7d7b4ee32b943f71196ab377f67c1105](https://github.com/dotnet/sdk/commit/ecc427bc7d7b4ee32b943f71196ab377f67c1105)
Diff | [Diff](https://github.com/dotnet/sdk/compare/9b4d3b99c89873c850b8ec1f7fd4b66d9eb6e3e2...ecc427bc7d7b4ee32b943f71196ab377f67c1105)
Configs | CompilationMode:tiered, RunKind:bepuphysics

### Regressions in DemoBenchmarks.OneBodyConstraintBenchmarks

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

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

| 37.63 μs | 49.33 μs | 1.31 | 0.00 | True | | |

![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.OneBodyConstraintBenchmarks*'
```

### DemoBenchmarks.OneBodyConstraintBenchmarks.OneBodyLinearMotor

#### 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 | [9b4d3b99c89873c850b8ec1f7fd4b66d9eb6e3e2](https://github.com/dotnet/sdk/commit/9b4d3b99c89873c850b8ec1f7fd4b66d9eb6e3e2)
Compare | [ecc427bc7d7b4ee32b943f71196ab377f67c1105](https://github.com/dotnet/sdk/commit/ecc427bc7d7b4ee32b943f71196ab377f67c1105)
Diff | [Diff](https://github.com/dotnet/sdk/compare/9b4d3b99c89873c850b8ec1f7fd4b66d9eb6e3e2...ecc427bc7d7b4ee32b943f71196ab377f67c1105)
Configs | CompilationMode:tiered, RunKind:bepuphysics

### Regressions in DemoBenchmarks.FourBodyConstraintBenchmarks

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

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

| 69.92 μs | 77.37 μs | 1.11 | 0.00 | True | | |

![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.FourBodyConstraintBenchmarks*'
```

### DemoBenchmarks.FourBodyConstraintBenchmarks.VolumeConstraint

#### 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 | [9b4d3b99c89873c850b8ec1f7fd4b66d9eb6e3e2](https://github.com/dotnet/sdk/commit/9b4d3b99c89873c850b8ec1f7fd4b66d9eb6e3e2)
Compare | [ecc427bc7d7b4ee32b943f71196ab377f67c1105](https://github.com/dotnet/sdk/commit/ecc427bc7d7b4ee32b943f71196ab377f67c1105)
Diff | [Diff](https://github.com/dotnet/sdk/compare/9b4d3b99c89873c850b8ec1f7fd4b66d9eb6e3e2...ecc427bc7d7b4ee32b943f71196ab377f67c1105)
Configs | CompilationMode:tiered, RunKind:bepuphysics

### Regressions in DemoBenchmarks.TwoBodyConstraintBenchmarks

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

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

| 99.43 μs | 112.13 μs | 1.13 | 0.00 | True | | |

![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.DistanceServo

#### 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 | [9b4d3b99c89873c850b8ec1f7fd4b66d9eb6e3e2](https://github.com/dotnet/sdk/commit/9b4d3b99c89873c850b8ec1f7fd4b66d9eb6e3e2)
Compare | [ecc427bc7d7b4ee32b943f71196ab377f67c1105](https://github.com/dotnet/sdk/commit/ecc427bc7d7b4ee32b943f71196ab377f67c1105)
Diff | [Diff](https://github.com/dotnet/sdk/compare/9b4d3b99c89873c850b8ec1f7fd4b66d9eb6e3e2...ecc427bc7d7b4ee32b943f71196ab377f67c1105)
Configs | CompilationMode:tiered, RunKind:bepuphysics

### Regressions in DemoBenchmarks.GroupedCollisionTesterBenchmarks

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

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

| 20.73 μs | 25.95 μs | 1.25 | 0.00 | True | | |

![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.GroupedCollisionTesterBenchmarks*'
```

### DemoBenchmarks.GroupedCollisionTesterBenchmarks.CheapCollisionBenchmarks

#### 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 named in src/benchmarks/real-world/bepuphysics2/OneBodyConstraintBenchmarks.cs, FourBodyConstraintBenchmarks.cs, and TwoBodyConstraintBenchmarks.cs, then run the documented benchmarks_ci.py filters on Ubuntu. Compare the reported baseline and test results and use the linked test reports to investigate the four regressions; done means reproducing the change and recording its cause or disposition.

Written by the indexing model from the issue text.