[Perf] Linux/x64: 6 Regressions on 4/18/2026 7:08:15 PM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | ubuntu 22.04
Queue | ViperUbuntu
Baseline | [dbd3e33df9ccf74b91045e095477726c2bf83916](https://github.com/dotnet/runtime/commit/dbd3e33df9ccf74b91045e095477726c2bf83916)
Compare | [b3753182ea941245f8f755b1a16a68b32a76e9b5](https://github.com/dotnet/runtime/commit/b3753182ea941245f8f755b1a16a68b32a76e9b5)
Diff | [Diff](https://github.com/dotnet/runtime/compare/dbd3e33df9ccf74b91045e095477726c2bf83916...b3753182ea941245f8f755b1a16a68b32a76e9b5)
Configs | CompilationMode:wasm, RunKind:micro, RuntimeType:coreclr

### Regressions in System.MathBenchmarks.Double

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

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

| 1.34 ms | 1.47 ms | 1.09 | 0.16 | False | | |
|

• [Atan2 - Duration of single invocation]()
• 📝 - [Benchmark Source]()
• [ADX - Test Multi Config Graph]()

| 841.98 μs | 913.93 μs | 1.09 | 0.08 | False | | |
|

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

| 925.87 μs | 983.02 μs | 1.06 | 0.11 | False | | |

![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 'System.MathBenchmarks.Double*'
```

### System.MathBenchmarks.Double.SinCos

#### ETL Files

#### Histogram

#### JIT Disasms

### System.MathBenchmarks.Double.Atan2

#### ETL Files

#### Histogram

#### JIT Disasms

### System.MathBenchmarks.Double.FusedMultiplyAdd

#### 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 | [dbd3e33df9ccf74b91045e095477726c2bf83916](https://github.com/dotnet/runtime/commit/dbd3e33df9ccf74b91045e095477726c2bf83916)
Compare | [b3753182ea941245f8f755b1a16a68b32a76e9b5](https://github.com/dotnet/runtime/commit/b3753182ea941245f8f755b1a16a68b32a76e9b5)
Diff | [Diff](https://github.com/dotnet/runtime/compare/dbd3e33df9ccf74b91045e095477726c2bf83916...b3753182ea941245f8f755b1a16a68b32a76e9b5)
Configs | CompilationMode:wasm, RunKind:micro, RuntimeType:coreclr

### Regressions in System.MathBenchmarks.Single

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

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

| 808.28 μs | 882.39 μs | 1.09 | 0.07 | False | | |
|

• [Atan2 - Duration of single invocation]()
• 📝 - [Benchmark Source]()
• [ADX - Test Multi Config Graph]()

| 808.77 μs | 857.25 μs | 1.06 | 0.04 | False | | |

![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 'System.MathBenchmarks.Single*'
```

### System.MathBenchmarks.Single.Pow

#### ETL Files

#### Histogram

#### JIT Disasms

### System.MathBenchmarks.Single.Atan2

#### 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 | [dbd3e33df9ccf74b91045e095477726c2bf83916](https://github.com/dotnet/runtime/commit/dbd3e33df9ccf74b91045e095477726c2bf83916)
Compare | [b3753182ea941245f8f755b1a16a68b32a76e9b5](https://github.com/dotnet/runtime/commit/b3753182ea941245f8f755b1a16a68b32a76e9b5)
Diff | [Diff](https://github.com/dotnet/runtime/compare/dbd3e33df9ccf74b91045e095477726c2bf83916...b3753182ea941245f8f755b1a16a68b32a76e9b5)
Configs | CompilationMode:wasm, RunKind:micro, RuntimeType:coreclr

### Regressions in System.Collections.CtorFromCollection<String>

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

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

| 16.41 ms | 22.96 ms | 1.40 | 0.28 | False | | |

![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 'System.Collections.CtorFromCollection*'
```

### System.Collections.CtorFromCollection<String>.ImmutableSortedSet(Size: 512)

#### 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)