[Perf] Linux/x64: 4 Regressions on 3/9/2026 8:55:59 AM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [d50a67b11dcfbd8b19c90d1d3eab507e0a6c3440](https://github.com/dotnet/sdk/commit/d50a67b11dcfbd8b19c90d1d3eab507e0a6c3440)
Compare | [798687480ca3d836b6af7bfbd9d492f756f3247f](https://github.com/dotnet/sdk/commit/798687480ca3d836b6af7bfbd9d492f756f3247f)
Diff | [Diff](https://github.com/dotnet/sdk/compare/d50a67b11dcfbd8b19c90d1d3eab507e0a6c3440...798687480ca3d836b6af7bfbd9d492f756f3247f)
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]()

| 22.26 μs | 25.78 μs | 1.16 | 0.00 | True | | |
|

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

| 20.65 μs | 24.99 μs | 1.21 | 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.GatherScatterBenchmarks*'
```

### DemoBenchmarks.GatherScatterBenchmarks.GatherState

#### ETL Files

#### Histogram

#### JIT Disasms

### DemoBenchmarks.GatherScatterBenchmarks.ScatterState

#### 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 | [d50a67b11dcfbd8b19c90d1d3eab507e0a6c3440](https://github.com/dotnet/sdk/commit/d50a67b11dcfbd8b19c90d1d3eab507e0a6c3440)
Compare | [798687480ca3d836b6af7bfbd9d492f756f3247f](https://github.com/dotnet/sdk/commit/798687480ca3d836b6af7bfbd9d492f756f3247f)
Diff | [Diff](https://github.com/dotnet/sdk/compare/d50a67b11dcfbd8b19c90d1d3eab507e0a6c3440...798687480ca3d836b6af7bfbd9d492f756f3247f)
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]()

| 20.25 μs | 22.69 μs | 1.12 | 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)

---

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [d50a67b11dcfbd8b19c90d1d3eab507e0a6c3440](https://github.com/dotnet/sdk/commit/d50a67b11dcfbd8b19c90d1d3eab507e0a6c3440)
Compare | [798687480ca3d836b6af7bfbd9d492f756f3247f](https://github.com/dotnet/sdk/commit/798687480ca3d836b6af7bfbd9d492f756f3247f)
Diff | [Diff](https://github.com/dotnet/sdk/compare/d50a67b11dcfbd8b19c90d1d3eab507e0a6c3440...798687480ca3d836b6af7bfbd9d492f756f3247f)
Configs | CompilationMode:tiered, RunKind:bepuphysics

### Regressions in DemoBenchmarks.TwoBodyConstraintBenchmarks

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

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

| 368.69 μs | 444.63 μs | 1.21 | 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.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)