[Perf] Linux/x64: 5 Regressions on 3/9/2026 8:57:50 AM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [0b60d265d30d96c827b73dbce74cb78f600d3c92](https://github.com/dotnet/sdk/commit/0b60d265d30d96c827b73dbce74cb78f600d3c92)
Compare | [181f8798913e9c234e19756db58f38a8cac176ea](https://github.com/dotnet/sdk/commit/181f8798913e9c234e19756db58f38a8cac176ea)
Diff | [Diff](https://github.com/dotnet/sdk/compare/0b60d265d30d96c827b73dbce74cb78f600d3c92...181f8798913e9c234e19756db58f38a8cac176ea)
Configs | CompilationMode:tiered, RunKind:bepuphysics

### Regressions in DemoBenchmarks.TwoBodyConstraintBenchmarks

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

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

| 94.86 μs | 123.16 μs | 1.30 | 0.00 | True | | |
|

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

| 85.69 μs | 104.08 μs | 1.21 | 0.00 | True | | |
|

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

| 65.32 μs | 78.83 μs | 1.21 | 0.00 | True | | |

![graph]()
![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.LinearAxisServo

#### ETL Files

#### Histogram

#### JIT Disasms

### DemoBenchmarks.TwoBodyConstraintBenchmarks.DistanceServo

#### ETL Files

#### Histogram

#### JIT Disasms

### DemoBenchmarks.TwoBodyConstraintBenchmarks.BallSocket

#### 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 | [0b60d265d30d96c827b73dbce74cb78f600d3c92](https://github.com/dotnet/sdk/commit/0b60d265d30d96c827b73dbce74cb78f600d3c92)
Compare | [181f8798913e9c234e19756db58f38a8cac176ea](https://github.com/dotnet/sdk/commit/181f8798913e9c234e19756db58f38a8cac176ea)
Diff | [Diff](https://github.com/dotnet/sdk/compare/0b60d265d30d96c827b73dbce74cb78f600d3c92...181f8798913e9c234e19756db58f38a8cac176ea)
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]()

| 22.38 μs | 25.49 μs | 1.14 | 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 | [0b60d265d30d96c827b73dbce74cb78f600d3c92](https://github.com/dotnet/sdk/commit/0b60d265d30d96c827b73dbce74cb78f600d3c92)
Compare | [181f8798913e9c234e19756db58f38a8cac176ea](https://github.com/dotnet/sdk/commit/181f8798913e9c234e19756db58f38a8cac176ea)
Diff | [Diff](https://github.com/dotnet/sdk/compare/0b60d265d30d96c827b73dbce74cb78f600d3c92...181f8798913e9c234e19756db58f38a8cac176ea)
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]()

| 16.93 μs | 22.20 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.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 at src/benchmarks/real-world/bepuphysics2/TwoBodyConstraintBenchmarks.cs, GatherScatterBenchmarks.cs, and GroupedCollisionTesterBenchmarks.cs. Run benchmarks_ci.py with the listed filters, then compare the baseline and test commits and review the linked reports. Done means confirming the regressions and identifying their cause or a clear follow-up.

Written by the indexing model from the issue text.