[Perf] Linux/arm64: 3 Regressions on 6/28/2026 1:49:22 PM +00:00

### Run Information

Name | Value
-- | --
Architecture | arm64
OS | azurelinux 3.0
Queue | CobaltAzureLinux
Baseline | [567a079a3f45e2e217815b49e1e09fa76ab72f11](https://github.com/dotnet/runtime/commit/567a079a3f45e2e217815b49e1e09fa76ab72f11)
Compare | [33db1610a13c814c71deb0865a23927305eecb5a](https://github.com/dotnet/runtime/commit/33db1610a13c814c71deb0865a23927305eecb5a)
Diff | [Diff](https://github.com/dotnet/runtime/compare/567a079a3f45e2e217815b49e1e09fa76ab72f11...33db1610a13c814c71deb0865a23927305eecb5a)
Configs | CompilationMode:tiered, R2RType:r2r_interpreter, RunKind:micro

### Regressions in System.ConsoleTests.Perf_Console

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

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

| 42.61 ns | 50.43 ns | 1.18 | 0.37 | False | | |
|

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

| 138.40 ns | 151.37 ns | 1.09 | 0.09 | False | | |
|

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

| 48.00 ns | 51.07 ns | 1.06 | 0.39 | 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
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.ConsoleTests.Perf_Console*'
```

### System.ConsoleTests.Perf_Console.BackgroundColor

#### ETL Files

#### Histogram

#### JIT Disasms

### System.ConsoleTests.Perf_Console.ResetColor

#### ETL Files

#### Histogram

#### JIT Disasms

### System.ConsoleTests.Perf_Console.ForegroundColor

#### 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 linked benchmark source in performance/src/benchmarks/micro/libraries/System.Console/Perf.Console.cs at the BackgroundColor, ResetColor, and ForegroundColor ranges. Read the benchmarking workflow and run the provided benchmarks_ci.py command, then compare the baseline and test results and linked reports. The report does not define a specific code change or completion condition.

Written by the indexing model from the issue text.