[Perf] ubuntu 20.04/arm64 : Improvement on 8/13/2022 7:28:42 AM

[performanceautofiler]

Run Information

Architecture	arm64
OS	ubuntu 20.04
Baseline	5eb776dc21d89063d66287461313c1e79073b57b
Compare	75228aca01a24087d21a76f32bf8d87dc9888648
Diff	Diff

Improvements in System.Tests.Perf_Array

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio	Baseline ETL	Compare ETL
IndexOfChar - Duration of single invocation	15.86 ns	10.92 ns	0.69	0.19	False
IndexOfShort - Duration of single invocation	18.72 ns	11.98 ns	0.64	0.20	False
Reverse - Duration of single invocation	91.55 ns	56.38 ns	0.62	0.01	False

Test Report

Repro

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

Payloads

Baseline
Compare

Histogram

System.Tests.Perf_Array.IndexOfChar

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 10.918872420999794 < 14.967253481209568.
IsChangePoint: Marked as a change because one of 5/31/2022 5:02:26 PM, 6/6/2022 8:15:49 PM, 6/19/2022 8:44:36 PM, 6/30/2022 12:21:07 PM, 7/7/2022 8:07:51 AM, 7/28/2022 12:19:57 AM, 8/13/2022 2:59:44 AM, 8/18/2022 11:13:04 AM falls between 8/9/2022 9:33:37 PM and 8/18/2022 11:13:04 AM.
IsImprovementStdDev: Marked as improvement because 4.58721076388849 (T) = (0 -13.473994169656438) / Math.Sqrt((1.6616782499730585 / (299)) + (2.258536695518571 / (26))) is greater than 1.967335607330539 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (26) - 2, .975) and 0.09379344790476536 = (14.868568472058934 - 13.473994169656438) / 14.868568472058934 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```#### System.Tests.Perf_Array.IndexOfShort

```log

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 11.981975094888265 < 16.400986827268508.
IsChangePoint: Marked as a change because one of 5/31/2022 5:02:26 PM, 6/21/2022 3:41:14 AM, 8/17/2022 10:14:53 AM, 8/18/2022 11:13:04 AM falls between 8/9/2022 9:33:37 PM and 8/18/2022 11:13:04 AM.
IsImprovementStdDev: Marked as improvement because 18.754328414884945 (T) = (0 -11.805378798764599) / Math.Sqrt((1.0137946413454975 / (299)) + (0.2916679928019616 / (4))) is greater than 1.9678765312856872 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (4) - 2, .975) and 0.3049953618290661 = (16.986043186464475 - 11.805378798764599) / 16.986043186464475 is greater than 0.05.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```#### System.Tests.Perf_Array.Reverse

```log

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 56.38399924226784 < 86.95863467513355.
IsChangePoint: Marked as a change because one of 6/22/2022 6:55:40 AM, 8/10/2022 5:14:51 PM, 8/18/2022 11:13:04 AM falls between 8/9/2022 9:33:37 PM and 8/18/2022 11:13:04 AM.
IsImprovementStdDev: Marked as improvement because 33.22692113097737 (T) = (0 -52.43909894612091) / Math.Sqrt((708.1923415127028 / (299)) + (16.356806205871568 / (37))) is greater than 1.9670919629190173 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (299) + (37) - 2, .975) and 0.5150976823681359 = (108.14363437613524 - 52.43909894612091) / 108.14363437613524 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]

dotnet/runtime#73768