[Perf] Changes at 12/8/2021 8:10:20 AM

[performanceautofiler]

Run Information

Architecture	x64
OS	ubuntu 18.04
Baseline	75fe52025a9be974dbf5bfb878f71ed3cad71b8c
Compare	261a2dd6fdb4290bac53be4ea912a7796e510770
Diff	Diff

Improvements in System.IO.Tests.StringReaderReadLineTests

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio	Baseline ETL	Compare ETL
ReadLine - Duration of single invocation	12.84 μs	2.53 μs	0.20	0.03	True

Test Report

Repro

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

Payloads

Baseline
Compare

Histogram

System.IO.Tests.StringReaderReadLineTests.ReadLine(LineLengthRange: [ 129, 1024])

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 we could not find enough baseline builds for window checking.
IsChangePoint: Marked as a change because one of 12/8/2021 6:13:42 AM, 1/5/2022 4:19:16 PM falls between 12/6/2021 2:46:54 PM and 1/5/2022 4:19:16 PM.
IsImprovementStdDev: Marked as improvement because 51.19388625071951 (T) = (0 -2540.0058309556784) / Math.Sqrt((453724.90930214623 / (12)) + (655.4074044420927 / (142))) is greater than 1.975693927815077 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (12) + (142) - 2, .975) and 0.796721682665499 = (12495.212791318116 - 2540.0058309556784) / 12495.212791318116 is greater than 0.05.
IsChangeEdgeDetector: Marked as regression because Edge Detector said so.

Docs

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