[Perf] Changes at 5/21/2022 3:14:39 PM

[performanceautofiler]

Run Information

Architecture	arm64
OS	ubuntu 18.04
Baseline	7626c5d8be527d6735eddcdc7c97423211d8f9e9
Compare	770f6ac51afb4bc959d9de7a7e3010b1e1c60d11
Diff	Diff

Improvements in System.Buffers.Text.Tests.Base64EncodeDecodeInPlaceTests

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio	Baseline ETL	Compare ETL
Base64DecodeInPlace - Duration of single invocation	260.07 ms	232.16 ms	0.89	0.06	False

Test Report

Repro

git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net6.0 --filter 'System.Buffers.Text.Tests.Base64EncodeDecodeInPlaceTests*'

Payloads

Baseline
Compare

Histogram

System.Buffers.Text.Tests.Base64EncodeDecodeInPlaceTests.Base64DecodeInPlace(NumberOfBytes: 200000000)

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 232.16033266666665 < 246.86093596904763.
IsChangePoint: Marked as a change because one of 5/21/2022 9:00:51 AM, 5/26/2022 4:44:18 AM falls between 5/17/2022 2:28:28 PM and 5/26/2022 4:44:18 AM.
IsImprovementStdDev: Marked as improvement because 8.413329035154 (T) = (0 -236725775.4464184) / Math.Sqrt((39878988872931.21 / (299)) + (387270366444941.3 / (18))) is greater than 1.9675235316906419 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (18) - 2, .975) and 0.14189738790771525 = (275871174.50815976 - 236725775.4464184) / 275871174.50815976 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