[Perf] Linux/arm64: 1 Regression on 3/21/2023 8:47:40 PM

[performanceautofiler]

Run Information

Name	Value
Architecture	arm64
OS	ubuntu 20.04
Queue	AmpereUbuntu
Baseline	7b651743dc951384f6c3d8455c88518022c7c3b9
Compare	b0b7aaefb88aa8d01b3d64fb40ac2f73a9d98c3e
Diff	Diff
Configs	CompilationMode:tiered, RunKind:micro

Regressions in System.Net.Tests.Perf_WebUtility

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio	Baseline ETL	Compare ETL
Decode_NoDecodingRequired - Duration of single invocation	79.51 ns	87.00 ns	1.09	0.08	False

Test Report

Repro

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

Payloads

Baseline
Compare

git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.Net.Tests.Perf_WebUtility*'

Payloads

Baseline
Compare

Histogram

System.Net.Tests.Perf_WebUtility.Decode_NoDecodingRequired

Description of detection logic

IsRegressionBase: Marked as regression because the compare was 5% greater than the baseline, and the value was not too small.
IsRegressionChecked: Marked as regression because the three check build points were 0.05 greater than the baseline.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
IsRegressionBase: Marked as regression because the compare was 5% greater than the baseline, and the value was not too small.
IsRegressionChecked: Marked as regression because the three check build points were 0.05 greater than the baseline.
IsRegressionWindowed: Marked as regression because 86.99887022350427 > 84.33696975469691.
IsChangePoint: Marked as a change because one of 3/21/2023 2:53:21 PM, 3/30/2023 4:24:24 AM falls between 3/21/2023 2:53:21 PM and 3/30/2023 4:24:24 AM.
IsRegressionStdDev: Marked as regression because -16.209366889572753 (T) = (0 -87.65876427284962) / Math.Sqrt((1.4355273185772552 / (9)) + (0.7135854817947057 / (30))) is less than -2.026192463026769 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (9) + (30) - 2, .025) and -0.08597216453987101 = (80.71916310119316 - 87.65876427284962) / 80.71916310119316 is less than -0.05.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

Docs

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

[AndyAyersMS]

See dotnet/runtime#84787