[Perf] Windows/x64: 1 Regression on 10/13/2023 1:18:03 PM

[performanceautofiler]

Run Information

Name	Value
Architecture	x64
OS	Windows 10.0.18362
Queue	TigerWindows
Baseline	8f54e894b1300cd50461c2c5b48ef8b9c45d92a2
Compare	82e6c605a92042477f4ac44bc8ca2039d29f0b6f
Diff	Diff
Configs	CompilationMode:tiered, RunKind:micro

Regressions in System.Collections.IterateForEach<Int32>

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio
ConcurrentDictionary - Duration of single invocation 📝 - Benchmark Source 📈 - ADX Test Multi Config Graph	6.37 μs	7.09 μs	1.11	0.15	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.Collections.IterateForEach<Int32>*'

Payloads

Baseline
Compare

System.Collections.IterateForEach<Int32>.ConcurrentDictionary(Size: 512)

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 7.090858454215775 > 6.664589784423293.
IsChangePoint: Marked as a change because one of 7/23/2023 4:13:29 AM, 8/7/2023 7:42:42 AM, 10/13/2023 9:34:06 AM, 10/16/2023 8:09:45 PM falls between 10/8/2023 1:17:11 AM and 10/16/2023 8:09:45 PM.
IsRegressionStdDev: Marked as regression because -3.4347198660096763 (T) = (0 -7178.113675528748) / Math.Sqrt((35522.99437627246 / (22)) + (305297.8463783429 / (6))) is less than -2.055529438636913 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (22) + (6) - 2, .025) and -0.12313544360619158 = (6391.138055870697 - 7178.113675528748) / 6391.138055870697 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