[Perf] Windows/x64: 2 Improvements on 8/15/2025 9:34:04 PM +00:00

[performanceautofiler]

Run Information

Name	Value
Architecture	x64
OS	Windows 10.0.22631
Queue	ViperWindows
Baseline	8d1ad7fb6953dc56d8664cf60453ee1f0db1aef5
Compare	c270c9e92d16d7fd0592eff15521f50cf8d9cf25
Diff	Diff
Configs	CompilationMode:tiered, RunKind:micro

Improvements in System.Linq.Tests.Perf_Enumerable

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio
SelectToArray - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	75.22 ns	53.97 ns	0.72	0.06	False
Except - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	1.94 μs	1.77 μs	0.91	0.01	False

Test Report

Repro

General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Linq.Tests.Perf_Enumerable*'

System.Linq.Tests.Perf_Enumerable.SelectToArray(input: List)

ETL Files

Histogram

JIT Disasms

System.Linq.Tests.Perf_Enumerable.Except(input: IEnumerable)

ETL Files

Histogram

JIT Disasms

Docs

Profiling workflow for dotnet/runtime repository
Benchmarking workflow for dotnet/runtime repository

[AndyAyersMS]

Second one is likely dotnet/runtime#118641; first is unclear/noise