[Perf] Windows/x64: 1 Regression on 1/23/2025 3:22:49 AM +00:00

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#111,924 opened on Jan 28, 2025 4 comments 0 reactions 0 assignees View on GitHub

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Assessment

Difficulty: 4/5
Estimated time: 3-5 days
Newbie friendliness: 38/100

Issue type: Bug
Clarity: Mostly clear
Activity status: Stale
Tech stack: csharp
Domain: performance

Research direction

Start with the System.Tests.Perf_Char.GetUnicodeCategory benchmark in performance/src/benchmarks/micro/libraries/System.Runtime/Perf.Char.cs at lines 87-91, then compare the listed baseline and regression commits. Run the provided benchmarks_ci.py command and review the linked report to confirm the Windows/x64 regression. Done means identifying and resolving the regression so the benchmark returns to baseline performance.

Written by the indexing model from the issue text.

Description

arch-x64 area-System.Globalization os-windows runtime-coreclr tenet-performance tenet-performance-benchmarks

Run Information

Name	Value
Architecture	x64
OS	Windows 10.0.22621
Queue	TigerWindows
Baseline	4bb0bcd9b5c47df97e51b462d8204d66c7d470fc
Compare	c74440f8291edd35843f3039754b887afe61766e
Diff	Diff
Configs	CompilationMode:tiered, RunKind:micro

Regressions in System.Tests.Perf_Char

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio
GetUnicodeCategory - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	1.45 ns	2.54 ns	1.75	0.06	False

graph
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.Tests.Perf_Char*'

System.Tests.Perf_Char.GetUnicodeCategory(c: 'א')

ETL Files

Histogram

JIT Disasms

Docs

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

Dominant language: C#
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Forks: 5.6k
PR merge metrics: PR metrics pending

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