[Perf] Linux/x64: 1 Regression on 12/3/2022 11:06:27 AM

[performanceautofiler]

Run Information

Architecture	x64
OS	ubuntu 18.04
Baseline	02c144afac6efe0f716e64ea0a701e2eec995866
Compare	4ce23f46ed20683a1b6649e9a43e09459007c9d8
Diff	Diff

Regressions in System.Linq.Tests.Perf_Enumerable

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio	Baseline ETL	Compare ETL
Select - Duration of single invocation	609.67 ns	664.46 ns	1.09	0.06	False

Test Report

Repro

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

Payloads

Baseline
Compare

Histogram

System.Linq.Tests.Perf_Enumerable.Select(input: List)

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 664.4627757855928 > 638.55713813276.
IsChangePoint: Marked as a change because one of 9/29/2022 7:42:19 AM, 10/2/2022 4:08:26 PM, 10/6/2022 2:13:23 PM, 11/11/2022 5:53:56 PM, 12/3/2022 7:24:45 AM, 12/6/2022 5:44:36 AM falls between 11/27/2022 4:37:47 PM and 12/6/2022 5:44:36 AM.
IsRegressionStdDev: Marked as regression because -19.118575093868465 (T) = (0 -668.2983792263739) / Math.Sqrt((229.82695551549904 / (41)) + (18.035271362079456 / (9))) is less than -2.010634757623041 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (41) + (9) - 2, .025) and -0.08567662797686505 = (615.5593313929337 - 668.2983792263739) / 615.5593313929337 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

[dakersnar]

@EgorBo could it have been caused by dotnet/runtime#79060?

[LoopedBard3]

Perf_Enumerable tests from dotnet/runtime#79306 are possibly related.