[Perf] Windows/x64: 2 Regressions on 5/29/2025 3:31:50 AM +00:00

[performanceautofiler]

Run Information

Name	Value
Architecture	x64
OS	Windows 10.0.22621
Queue	TigerWindows
Baseline	e83ee5b8730662773420a65cf04148e6de72aeac
Compare	4252c8d09b2ec537928f34dad269f02f167c8ce5
Diff	Diff
Configs	CompilationMode:tiered, RunKind:micro

Regressions in System.Text.Json.Tests.Perf_Base64

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio
WriteByteArrayAsBase64_NoEscaping - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	53.62 ns	75.67 ns	1.41	0.42	False
WriteByteArrayAsBase64_HeavyEscaping - Duration of single invocation 📝 - Benchmark Source ADX - Test Multi Config Graph	68.10 ns	79.28 ns	1.16	0.50	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.Text.Json.Tests.Perf_Base64*'

System.Text.Json.Tests.Perf_Base64.WriteByteArrayAsBase64_NoEscaping(NumberOfBytes: 100)

ETL Files

Histogram

JIT Disasms

System.Text.Json.Tests.Perf_Base64.WriteByteArrayAsBase64_HeavyEscaping(NumberOfBytes: 100)

ETL Files

Histogram

JIT Disasms

Docs

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