[Perf] Windows/x64: 2 Regressions on 6/3/2026 8:50:19 PM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | Windows 10.0.22631
Queue | ViperWindows
Baseline | [953380f224e6f6ee72662fdee8b27900adbb29c2](https://github.com/dotnet/sdk/commit/953380f224e6f6ee72662fdee8b27900adbb29c2)
Compare | [1edacc8de1a9fef827f05750fb9f64f1dcec9abd](https://github.com/dotnet/sdk/commit/1edacc8de1a9fef827f05750fb9f64f1dcec9abd)
Diff | [Diff](https://github.com/dotnet/sdk/compare/953380f224e6f6ee72662fdee8b27900adbb29c2...1edacc8de1a9fef827f05750fb9f64f1dcec9abd)
Configs | CompilationMode:tiered, RunKind:fsharpmicro

### Regressions in MicroBenchmarks.FSharp.Collections+CollectionsBenchmark

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

• [ArrayRemoveAtBeginning - Duration of single invocation]()
• [ADX - Test Multi Config Graph]()

| 1.56 μs | 1.70 μs | 1.09 | 0.03 | False | | |
|

• [ArrayUpdateAtBeginning - Duration of single invocation]()
• [ADX - Test Multi Config Graph]()

| 1.57 μs | 1.68 μs | 1.07 | 0.03 | 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
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'MicroBenchmarks.FSharp.Collections+CollectionsBenchmark*'
```

### MicroBenchmarks.FSharp.Collections+CollectionsBenchmark.ArrayRemoveAtBeginning(Length: 10000)

#### ETL Files

#### Histogram

#### JIT Disasms

### MicroBenchmarks.FSharp.Collections+CollectionsBenchmark.ArrayUpdateAtBeginning(Length: 10000)

#### 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)