[Perf] Windows/x64: 2 Improvements on 6/19/2026 6:03:58 PM +00:00

### Run Information

Name | Value
-- | --
Architecture | x64
OS | Windows 10.0.22631
Queue | ViperWindows
Baseline | [58d1b48b6d2573b77906036880082c1be0766f63](https://github.com/dotnet/sdk/commit/58d1b48b6d2573b77906036880082c1be0766f63)
Compare | [b756a8d8a0e64905e16c81911bb09a8110bc3395](https://github.com/dotnet/sdk/commit/b756a8d8a0e64905e16c81911bb09a8110bc3395)
Diff | [Diff](https://github.com/dotnet/sdk/compare/58d1b48b6d2573b77906036880082c1be0766f63...b756a8d8a0e64905e16c81911bb09a8110bc3395)
Configs | CompilationMode:tiered, RunKind:fsharpmicro

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

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

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

| 6.33 ns | 3.94 ns | 0.62 | 0.17 | False | | |
|

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

| 6.32 ns | 3.93 ns | 0.62 | 0.24 | 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.ListRemoveManyAtBeginning(Length: 10000)

#### ETL Files

#### Histogram

#### JIT Disasms

### MicroBenchmarks.FSharp.Collections+CollectionsBenchmark.ListRemoveManyAtBeginning(Length: 1000)

#### 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 command in the Repro section and review the linked Test Report for ListRemoveManyAtBeginning at lengths 1000 and 10000. Compare the listed baseline and test commits and inspect the benchmark history to determine whether the improvement needs action. Done requires a confirmed explanation or a clearly scoped follow-up change, but the issue does not identify one.

Written by the indexing model from the issue text.