[Perf] Linux/x64: 2 Regressions on 10/13/2022 2:25:23 AM

[performanceautofiler]

Run Information

Architecture	x64
OS	ubuntu 18.04
Baseline	f2de14d71ad44045dfa151d61ced3b91454acce8
Compare	fc0e636ea3af9b297441a9c9270298937f748300
Diff	Diff

Regressions in System.Perf_Convert

Benchmark	Baseline	Test	Test/Base	Test Quality	Edge Detector	Baseline IR	Compare IR	IR Ratio	Baseline ETL	Compare ETL
ToBase64CharArray - Duration of single invocation	16.37 μs	21.69 μs	1.33	0.05	False
ToBase64String - Duration of single invocation	16.48 μs	21.26 μs	1.29	0.05	False

Test Report

Repro

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

Related Issues

Regressions

Improvements

Details

Payloads

Baseline
Compare

Histogram

Edge Detector Info

Collection Data

System.Perf_Convert.ToBase64CharArray(binaryDataSize: 1024, formattingOptions: None)

Description of detection logic

IsRegressionChecked: Marked as regression because the three check build points were 0.05 greater than the baseline.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
IsRegressionBase: Marked as regression because the compare was 5% greater than the baseline, and the value was not too small.
IsRegressionWindowed: Marked as regression because 21.688742003994992 > 17.10839136453418.
IsChangePoint: Marked as a change because one of 8/5/2022 12:58:40 PM, 10/12/2022 7:36:52 PM, 10/18/2022 1:35:00 AM falls between 10/7/2022 6:01:23 PM and 10/18/2022 1:35:00 AM.
IsRegressionStdDev: Marked as regression because -24.92516155313513 (T) = (0 -21183.22159469178) / Math.Sqrt((53859.25126932433 / (29)) + (670213.4743441053 / (18))) is less than -2.0141033888794695 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (29) + (18) - 2, .025) and -0.3031707869336329 = (16255.138472322573 - 21183.22159469178) / 16255.138472322573 is less than -0.05.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

```#### System.Perf_Convert.ToBase64String(formattingOptions: None)

```log

Description of detection logic

IsRegressionChecked: Marked as regression because the three check build points were 0.05 greater than the baseline.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
IsRegressionBase: Marked as regression because the compare was 5% greater than the baseline, and the value was not too small.
IsRegressionWindowed: Marked as regression because 21.26069621569677 > 17.360389535700815.
IsChangePoint: Marked as a change because one of 7/10/2022 3:20:59 AM, 8/5/2022 12:58:40 PM, 10/12/2022 5:22:50 PM, 10/18/2022 1:35:00 AM falls between 10/7/2022 6:01:23 PM and 10/18/2022 1:35:00 AM.
IsRegressionStdDev: Marked as regression because -59.63163088416556 (T) = (0 -21346.200330990596) / Math.Sqrt((79688.06170367429 / (29)) + (60041.16911489531 / (17))) is less than -2.0153675744421933 = MathNet.Numerics.Distributions.StudentT.InvCDF(0, 1, (29) + (17) - 2, .025) and -0.28431269295493283 = (16620.718963601837 - 21346.200330990596) / 16620.718963601837 is less than -0.05.
IsImprovementBase: Marked as not an improvement because the compare was not 5% less than the baseline, or the value was too small.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.
IsChangeEdgeDetector: Marked not as a regression because Edge Detector said so.

Docs

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

[kotlarmilos]

Regression in d337cba

I couldn't figure out the best area label to add to this issue. If you have write-permissions please help me learn by adding exactly one area label.

[kotlarmilos]

dotnet/perf-autofiling-issues#9023 (comment)