[Perf] Linux/arm64: 2 Improvements on 10/14/2023 5:18:12 AM

[performanceautofiler]

Run Information

Name	Value
Architecture	arm64
OS	ubuntu 20.04
Queue	AmpereUbuntu
Baseline	851c274cc50544bf11a59e1011dbc594ca7010b0
Compare	5233eea73e60915d849b945dccec150bc57827c6
Diff	Diff
Configs	CompilationMode:tiered, RunKind:micro

Improvements in System.IO.Tests.BinaryReaderTests

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio
DefaultCtor - Duration of single invocation 📝 - Benchmark Source 📈 - ADX Test Multi Config Graph	37.16 ns	17.21 ns	0.46	0.44	False
ReadSmallString - Duration of single invocation 📝 - Benchmark Source 📈 - ADX Test Multi Config Graph	55.73 ns	46.93 ns	0.84	0.04	False

Test Report

Repro

General Docs link: https://github.com/dotnet/performance/blob/main/docs/benchmarking-workflow-dotnet-runtime.md

git clone https://github.com/dotnet/performance.git
python3 .\performance\scripts\benchmarks_ci.py -f net8.0 --filter 'System.IO.Tests.BinaryReaderTests*'

Details

Payloads

Baseline
Compare

System.IO.Tests.BinaryReaderTests.DefaultCtor

ETL Files

Histogram

Description of detection logic

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.
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 10/13/2023 7:46:10 PM, 10/18/2023 4:42:02 PM falls between 10/9/2023 8:09:24 PM and 10/18/2023 4:42:02 PM.
IsImprovementStdDev: Marked as improvement because 63.93255081975221 (T) = (0 -17.2904241963343) / Math.Sqrt((14.64288811564254 / (126)) + (0.0518272671856374 / (7))) is greater than 1.9782385392300934 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (126) + (7) - 2, .975) and 0.5652245474277067 = (39.7686302067831 - 17.2904241963343) / 39.7686302067831 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

JIT Disasms

System.IO.Tests.BinaryReaderTests.ReadSmallString

ETL Files

Histogram

Description of detection logic

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.
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 8/31/2023 3:02:32 AM, 9/7/2023 2:36:34 PM, 10/13/2023 7:46:10 PM, 10/18/2023 4:42:02 PM falls between 10/9/2023 8:09:24 PM and 10/18/2023 4:42:02 PM.
IsImprovementStdDev: Marked as improvement because 26.675441447911112 (T) = (0 -47.041789786518926) / Math.Sqrt((3.330811654652138 / (126)) + (0.45415244906630514 / (7))) is greater than 1.9782385392300934 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (126) + (7) - 2, .975) and 0.1462877094838017 = (55.10262685579359 - 47.041789786518926) / 55.10262685579359 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

JIT Disasms

Docs

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