Regressions in System.Globalization.Tests.StringSearch

[performanceautofiler]

Run Information

Name	Value
Architecture	x64
OS	Windows 10.0.19042
Queue	OwlWindows
Baseline	538cd03b39afb57eb17ea77a86b3c94c039b8822
Compare	c7d36b48a493789c9267069645e2690e804a2067
Diff	Diff
Configs	CompilationMode:tiered, RunKind:micro

Regressions in System.Globalization.Tests.StringSearch

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio
LastIndexOf_Word_NotFound - Duration of single invocation 📝 - Benchmark Source 📈 - ADX Test Multi Config Graph	397.12 ns	516.40 ns	1.30	0.03	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.Globalization.Tests.StringSearch*'

Payloads

Baseline
Compare

System.Globalization.Tests.StringSearch.LastIndexOf_Word_NotFound(Options: (en-US, OrdinalIgnoreCase, False))

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 516.3989242627822 > 416.48485541506614.
IsChangePoint: Marked as a change because one of 6/22/2023 7:55:14 AM, 8/27/2023 2:42:29 PM, 9/4/2023 9:28:57 AM falls between 8/26/2023 7:53:22 PM and 9/4/2023 9:28:57 AM.
IsRegressionStdDev: Marked as regression because -523.7204883102902 (T) = (0 -516.5964530091254) / Math.Sqrt((0.39932907677050516 / (9)) + (0.19792037708236598 / (24))) is less than -2.0395134463927462 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (9) + (24) - 2, .025) and -0.30301021705518705 = (396.4638544252073 - 516.5964530091254) / 396.4638544252073 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

[cincuranet]

Windows x64 Intel and AMD both are stable-regressed. Transfering.