[Perf] Linux/x64: 4 Regressions on 8/30/2026 9:38:08 AM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [100002779ceec649fcfd00c233f673b494130827](https://github.com/dotnet/sdk/commit/100002779ceec649fcfd00c233f673b494130827)
Compare | [17974d44ef211135d3e9b0b84f5e03830dd59ad8](https://github.com/dotnet/sdk/commit/17974d44ef211135d3e9b0b84f5e03830dd59ad8)
Diff | [Diff](https://github.com/dotnet/sdk/compare/100002779ceec649fcfd00c233f673b494130827...17974d44ef211135d3e9b0b84f5e03830dd59ad8)
Configs | CompilationMode:tiered, RunKind:bepuphysics

### Regressions in DemoBenchmarks.TwoBodyConstraintBenchmarks

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

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

| 17.39 μs | 28.42 μs | 1.63 | 0.00 | True | | |
|

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

| 44.02 μs | 55.45 μs | 1.26 | 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.CenterDistanceConstraint

#### ETL Files

#### Histogram

#### JIT Disasms

### DemoBenchmarks.TwoBodyConstraintBenchmarks.AngularSwivelHinge

#### 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 | [100002779ceec649fcfd00c233f673b494130827](https://github.com/dotnet/sdk/commit/100002779ceec649fcfd00c233f673b494130827)
Compare | [17974d44ef211135d3e9b0b84f5e03830dd59ad8](https://github.com/dotnet/sdk/commit/17974d44ef211135d3e9b0b84f5e03830dd59ad8)
Diff | [Diff](https://github.com/dotnet/sdk/compare/100002779ceec649fcfd00c233f673b494130827...17974d44ef211135d3e9b0b84f5e03830dd59ad8)
Configs | CompilationMode:tiered, RunKind:bepuphysics

### Regressions in DemoBenchmarks.GatherScatterBenchmarks

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

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

| 21.31 μs | 25.63 μs | 1.20 | 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.GatherScatterBenchmarks*'
```

### DemoBenchmarks.GatherScatterBenchmarks.GatherState

#### 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 | [100002779ceec649fcfd00c233f673b494130827](https://github.com/dotnet/sdk/commit/100002779ceec649fcfd00c233f673b494130827)
Compare | [17974d44ef211135d3e9b0b84f5e03830dd59ad8](https://github.com/dotnet/sdk/commit/17974d44ef211135d3e9b0b84f5e03830dd59ad8)
Diff | [Diff](https://github.com/dotnet/sdk/compare/100002779ceec649fcfd00c233f673b494130827...17974d44ef211135d3e9b0b84f5e03830dd59ad8)
Configs | CompilationMode:tiered, RunKind:bepuphysics

### Regressions in DemoBenchmarks.SweepBenchmarks

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

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

| 3.00 μs | 3.31 μs | 1.10 | 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.SweepBenchmarks*'
```

### DemoBenchmarks.SweepBenchmarks.CapsuleBox

#### 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 by running scripts/benchmarks_ci.py with the supplied DemoBenchmarks filters on Ubuntu 22.04, then inspect the linked benchmark sources in TwoBodyConstraintBenchmarks.cs, GatherScatterBenchmarks.cs, and SweepBenchmarks.cs alongside the regression reports. Done means confirming the reported regressions and documenting or addressing their cause.

Written by the indexing model from the issue text.