[Perf] Windows/x86: 11 Regressions on 3/27/2026 4:40:59 AM +00:00

### Run Information

Name | Value
-- | --
Architecture | x86
OS | Windows 10.0.22631
Queue | ViperWindows
Baseline | [487cc8c4a5776931d7d573444f2b6c08b65f1e27](https://github.com/dotnet/runtime/commit/487cc8c4a5776931d7d573444f2b6c08b65f1e27)
Compare | [3106c4ff21d8f6a13db84571ce4c4ba32c81d032](https://github.com/dotnet/runtime/commit/3106c4ff21d8f6a13db84571ce4c4ba32c81d032)
Diff | [Diff](https://github.com/dotnet/runtime/compare/487cc8c4a5776931d7d573444f2b6c08b65f1e27...3106c4ff21d8f6a13db84571ce4c4ba32c81d032)
Configs | CompilationMode:tiered, RunKind:micro

### Regressions in System.Numerics.Tests.Perf_BigInteger

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

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

| 70.58 ns | 101.51 ns | 1.44 | 0.03 | False | | |
|

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

| 8.78 ns | 15.06 ns | 1.72 | 0.12 | False | | |
|

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

| 2.31 μs | 5.22 μs | 2.26 | 0.01 | False | | |
|

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

| 989.90 ns | 1.16 μs | 1.17 | 0.00 | False | | |
|

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

| 49.24 ns | 60.50 ns | 1.23 | 0.06 | False | | |
|

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

| 2.18 μs | 5.54 μs | 2.54 | 0.02 | False | | |
|

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

| 59.51 ns | 115.51 ns | 1.94 | 0.02 | False | | |
|

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

| 6.81 ns | 9.47 ns | 1.39 | 0.37 | False | | |
|

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

| 60.86 ns | 119.40 ns | 1.96 | 0.02 | False | | |
|

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

| 7.89 ns | 13.02 ns | 1.65 | 0.01 | False | | |
|

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

| 97.10 ns | 132.94 ns | 1.37 | 0.04 | False | | |

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[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
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Numerics.Tests.Perf_BigInteger*'
```

### System.Numerics.Tests.Perf_BigInteger.Parse(numberString: 123)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Numerics.Tests.Perf_BigInteger.ToByteArray(numberString: -2147483648)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Numerics.Tests.Perf_BigInteger.Add(arguments: 65536,65536 bits)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Numerics.Tests.Perf_BigInteger.Parse(numberString: 12345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Numerics.Tests.Perf_BigInteger.ToStringX(numberString: -2147483648)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Numerics.Tests.Perf_BigInteger.Subtract(arguments: 65536,65536 bits)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Numerics.Tests.Perf_BigInteger.Add(arguments: 1024,1024 bits)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Numerics.Tests.Perf_BigInteger.Remainder(arguments: 16,8 bits)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Numerics.Tests.Perf_BigInteger.Subtract(arguments: 1024,1024 bits)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Numerics.Tests.Perf_BigInteger.Divide(arguments: 16,8 bits)

#### ETL Files

#### Histogram

#### JIT Disasms

### System.Numerics.Tests.Perf_BigInteger.Parse(numberString: -2147483648)

#### 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)