[Perf] Changes at 2/2/2022 8:22:24 PM

[performanceautofiler]

Run Information

Architecture	arm64
OS	ubuntu 18.04
Baseline	869ae1a373388da43a9263d3e8782c84dd91e37b
Compare	1df36c702a46363336b6ea5d0d9558d513e7be8e
Diff	Diff

Improvements in System.Collections.Tests.Perf_BitArray

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio	Baseline ETL	Compare ETL
BitArrayXor - Duration of single invocation	58.53 ns	46.78 ns	0.80	0.53	False

Test Report

Repro

git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net6.0 --filter 'System.Collections.Tests.Perf_BitArray*'

Payloads

Baseline
Compare

Histogram

System.Collections.Tests.Perf_BitArray.BitArrayXor(Size: 512)

Description of detection logic

IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsRegressionBase: Marked as not a regression because the compare was not 5% greater than the baseline, or the value was too small.
IsImprovementBase: Marked as improvement because the compare was 5% less than the baseline, and the value was not too small.
IsImprovementCheck: Marked as improvement because the three check build points were 0.05 less than the baseline.
IsImprovementWindowed:Marked as improvement because 46.77707741904154 < 55.250817734086546.
IsChangePoint: Marked as a change because one of 11/1/2021 4:11:40 PM, 2/2/2022 1:56:18 PM, 2/8/2022 11:58:21 PM falls between 1/31/2022 9:06:05 AM and 2/8/2022 11:58:21 PM.
IsImprovementStdDev: Marked as improvement because 15.904000061206268 (T) = (0 -50.88745565792189) / Math.Sqrt((100.42959808912512 / (299)) + (11.590644762036378 / (23))) is greater than 1.9674049737480528 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (23) - 2, .975) and 0.22264370268290326 = (65.4622028966005 - 50.88745565792189) / 65.4622028966005 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

Docs

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