[Perf] Improvement on 8/4/2022 12:05:09 AM

[performanceautofiler]

Run Information

Architecture	arm64
OS	ubuntu 18.04
Baseline	ed561a2d2f88d9a585b8db95dda03d8c0de4ae4e
Compare	0ea3031aaf195a5ba400708a24002f6a498097bb
Diff	Diff

Improvements in System.Tests.Perf_Environment

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio	Baseline ETL	Compare ETL
GetLogicalDrives - Duration of single invocation	124.38 μs	72.10 μs	0.58	0.59	False

Test Report

Repro

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

Payloads

Baseline
Compare

Histogram

System.Tests.Perf_Environment.GetLogicalDrives

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 72.09598111979166 < 105.8280114243813.
IsChangePoint: Marked as a change because one of 5/24/2022 3:42:52 PM, 8/3/2022 6:38:34 PM, 8/5/2022 7:33:33 PM falls between 7/28/2022 6:13:35 AM and 8/5/2022 7:33:33 PM.
IsImprovementStdDev: Marked as improvement because 16.448808054040395 (T) = (0 -76456.80764692918) / Math.Sqrt((80773110.8820238 / (299)) + (32647032.885856338 / (6))) is greater than 1.967824097752068 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (6) - 2, .975) and 0.33956166446970093 = (115766.76206346831 - 76456.80764692918) / 115766.76206346831 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

[kunalspathak]

Cannot establish a theory.

[EgorBo]

Should be improved by dotnet/runtime#73278