[Perf] Linux/arm64: 1 Regression on 8/5/2025 9:21:29 PM +00:00

[performanceautofiler]

Run Information

Name	Value
Architecture	arm64
OS	ubuntu 22.04
Queue	AmpereUbuntu
Baseline	0549417cbd2fcc2edd26f4a8f9ab07d357f34de2
Compare	5faa3467d4de01df6d601fbaaa27520c0cd507dc
Diff	Diff
Configs	CompilationMode:tiered, RunKind:micro

Regressions in System.Text.Tests.Perf_Encoding

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio
GetByteCount - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	33.92 ns	40.60 ns	1.20	0.02	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
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Text.Tests.Perf_Encoding*'

System.Text.Tests.Perf_Encoding.GetByteCount(size: 512, encName: "utf-8")

ETL Files

Histogram

JIT Disasms

Docs

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

[DrewScoggins]

Seems related to #116104

[dotnet-policy-service]

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