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[Perf] Windows/arm64: 1 Regression on 9/21/2022 4:00:51 AM #8662

@performanceautofiler

Description

@performanceautofiler

Run Information

Architecture arm64
OS Windows 10.0.19041
Baseline e5b44af5dfb441d51c2a3d83fa6fee8257d99915
Compare 49751b22745881ce98f84dddf31557c33546de36
Diff Diff

Regressions in System.Buffers.Tests.ReadOnlySequenceTests<Byte>

Benchmark Baseline Test Test/Base Test Quality Edge Detector Baseline IR Compare IR IR Ratio Baseline ETL Compare ETL
IterateForEachSingleSegment - Duration of single invocation 20.38 ns 23.36 ns 1.15 0.23 False

graph
Test Report

Repro

git clone https://github.com/dotnet/performance.git
py .\performance\scripts\benchmarks_ci.py -f net6.0 --filter 'System.Buffers.Tests.ReadOnlySequenceTests&lt;Byte&gt;*'

Payloads

Baseline
Compare

Histogram

Edge Detector Info

Collection Data

System.Buffers.Tests.ReadOnlySequenceTests<Byte>.IterateForEachSingleSegment


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 23.35906192269433 > 21.68776366412728.
IsChangePoint: Marked as a change because one of 7/6/2022 5:19:04 PM, 9/20/2022 10:35:57 PM, 9/22/2022 3:16:12 AM falls between 9/13/2022 2:36:07 PM and 9/22/2022 3:16:12 AM.
IsRegressionStdDev: Marked as regression because -9.883905846979554 (T) = (0 -23.042569984878817) / Math.Sqrt((0.27813627779117395 / (49)) + (0.14508962573615755 / (4))) is less than -2.007583770314729 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (49) + (4) - 2, .025) and -0.09631454836709699 = (21.01821053017997 - 23.042569984878817) / 21.01821053017997 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.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

Docs

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

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