[Perf] Changes at 2/4/2022 8:03:09 AM

[performanceautofiler]

Run Information

Architecture	arm64
OS	Windows 10.0.19041
Baseline	5da4464f42bd8b790909f2d2b50d80922e3cf934
Compare	9055c8b01bc7ceba6ecb282b44528b38e1ac7694
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	30.03 ns	27.49 ns	0.92	0.14	False

Test Report

Repro

git clone https://github.com/dotnet/performance.git
py .\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 27.49063297082642 < 28.625313831255475.
IsChangePoint: Marked as a change because one of 11/4/2021 5:49:01 AM, 2/4/2022 1:40:45 AM, 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 14.001923422833766 (T) = (0 -27.742687688138336) / Math.Sqrt((1.0504500394722143 / (299)) + (0.4965188058612856 / (17))) is greater than 1.9675476980854363 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (17) - 2, .975) and 0.08365751478129352 = (30.275457196025236 - 27.742687688138336) / 30.275457196025236 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

[EgorBo]

Probably dotnet/runtime#63720?