[Perf] Windows/arm64: 1 Regression on 10/16/2023 3:26:10 AM

[performanceautofiler]

Run Information

Name	Value
Architecture	arm64
OS	Windows 10.0.19041
Queue	SurfaceWindows
Baseline	3e0afa65b43fe5574066236992d6f2c58a461635
Compare	a30d6c9dc413d9c60bed2d4daecba4552abd7fe9
Diff	Diff
Configs	CompilationMode:tiered, RunKind:micro

Regressions in System.IO.Tests.BinaryReaderTests

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio
ReadHalf - Duration of single invocation 📈 - ADX Test Multi Config Graph	4.97 ns	6.18 ns	1.24	0.19	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.IO.Tests.BinaryReaderTests*'

Payloads

Baseline
Compare

System.IO.Tests.BinaryReaderTests.ReadHalf

ETL Files

Histogram

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 we could not find enough baseline builds for window checking.
IsChangePoint: Marked as a change because one of 10/15/2023 3:35:00 PM, 10/18/2023 4:42:02 PM falls between 10/9/2023 8:09:24 PM and 10/18/2023 4:42:02 PM.
IsRegressionStdDev: Marked as regression because -7.604440685595872 (T) = (0 -6.134717849709509) / Math.Sqrt((0.30233152183128814 / (12)) + (0.0017815571974615088 / (3))) is less than -2.160368656462815 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (12) + (3) - 2, .025) and -0.24853207558633195 = (4.913544449251367 - 6.134717849709509) / 4.913544449251367 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.

JIT Disasms

Docs

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

[EgorBo]

Could be affected by dotnet/runtime#80331