[Perf] Linux/arm64: 1 Regression on 2/8/2023 4:45:44 PM

[performanceautofiler]

Run Information

Architecture	arm64
OS	ubuntu 20.04
Baseline	1b788f4dc3e3a8829488e52c032ad6a70671e070
Compare	765e3dbb2d3aa2b114d8c07e44ae2ca926df16b4
Diff	Diff

Regressions in System.Text.Json.Tests.Perf_Reader

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio	Baseline ETL	Compare ETL
ReadSingleSpanSequenceEmptyLoop - Duration of single invocation	4.17 μs	4.42 μs	1.06	0.01	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.Text.Json.Tests.Perf_Reader*'

Payloads

Baseline
Compare

Histogram

System.Text.Json.Tests.Perf_Reader.ReadSingleSpanSequenceEmptyLoop(IsDataCompact: True, TestCase: DeepTree)

Description of detection logic

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 4.415738698235032 > 4.352695078822818.
IsChangePoint: Marked as a change because one of 2/8/2023 10:48:55 AM, 2/16/2023 5:39:51 AM falls between 2/7/2023 2:48:42 AM and 2/16/2023 5:39:51 AM.
IsRegressionStdDev: Marked as regression because -29.344653630972044 (T) = (0 -4405.051486171253) / Math.Sqrt((815.8645835674732 / (13)) + (262.87612317000907 / (26))) is less than -2.026192463026769 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (13) + (26) - 2, .025) and -0.06029442761772727 = (4154.554972120844 - 4405.051486171253) / 4154.554972120844 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